Optus vs Telstra vs Vodafone vs TPG vs Belong Australia 2026: 5-Way Postpaid Mobile Plan Comparison

Australian mobile in 2026 is a five-way conversation, not a three-way. The three network operators (Telstra, Optus, Vodafone Australia) still dominate the postpaid market and set the coverage benchmarks, but two network-adjacent brands sit close enough to the postpaid experience to belong in any comparison: TPG (Australia) on the Vodafone network under TPG Telecom ownership, and Belong on the Telstra wholesale network under Telstra ownership with the 40GB banking plan tier that changes the low-usage-line math.

The point of confusion worth resolving upfront: TPG (Australia) is not SIMBA (Singapore). TPG Telecom's Australian mobile operation under the TPG brand runs on the Vodafone network in Australia in 2026. SIMBA in Singapore is a separate brand under Tuas Limited that provides Singapore mobile only. Consumer press has occasionally conflated the two because TPG Telecom held Singapore assets at various times; the current operational brands are distinct. This piece is Australia-only.

Verdict up front

For Australian postpaid mobile in 2026:

• Best premium coverage: Telstra for regional and remote.
• Best price-quality balance metro: Optus with SubHub value if you already pay for streaming.
• Best value-tier direct-brand: TPG (Australia) on the Vodafone network for metro users.
• Best low-usage backup line: Belong 40GB banking plan on Telstra wholesale.
• Best household stack: Family-plan discount on the operator matching your coverage need, or four-line MVNO switch for the deeper saving.

Compare postpaid mobile plans and household telco spend at shopback.com.au. Two-minute signup, works via the Chrome extension or the ShopBack app in-app browser.

What ShopBack does on a postpaid mobile sign-up

ShopBack is Australia's cashback platform, with more than 20 million members across 13 markets. For a postpaid mobile sign-up, the mechanic is direct: sign up at shopback.com.au, click through from the ShopBack app or Chrome extension to Telstra, Optus, Vodafone Australia, TPG (Australia), or Belong Australian sites, and complete the sign-up in the same session so the sale tracks. Cashback pending shows in a few days and confirms after the first billing cycle completes on the new carrier. Payout is to a linked Australian bank account. Sign-up cashback via ShopBack on eligible postpaid plans at the current published rate on the merchant page regularly appears as first-month or fixed-dollar cashback offers that can offset A$40 to A$150 of the switching cost. On a household of four moving all four lines, the cashback compounds. ShopBack Snaps, Australia's receipt-based cashback layer, is not relevant to online postpaid sign-ups; the click-through cashback rail is the whole game.

Network map: the three networks and the two adjacent brands

The three Australian mobile networks:

• Telstra: Deepest coverage across regional and remote Australia, mining routes, national parks. Retail Telstra plans get the full retail coverage footprint. Wholesale Telstra MVNOs (Belong, Aldi Mobile, Woolworths Mobile) get roughly 99 percent of the metro population but smaller regional footprint. Boost Mobile is the exception with full retail Telstra coverage.
• Optus: Strong metro and inter-city coverage. Regional WA, NT, remote QLD, and rural Victoria weaker than Telstra. SingTel-owned parent company.
• Vodafone Australia: Metro-focused, strongest in Sydney, Melbourne, Brisbane, Perth, Adelaide. Regional coverage weakest of the three. Now part of TPG Telecom following the 2020 merger.

The two network-adjacent brands in this comparison:

• TPG (Australia) runs on the Vodafone network under TPG Telecom ownership. Value-tier plans at metro-focused pricing.
• Belong runs on the Telstra wholesale network under Telstra ownership. Month-to-month plans, straightforward pricing, and the 40GB banking plan tier.

Chain by chain

Telstra

Telstra (ASX: TLS) sets the Australian premium coverage benchmark. Mainstream postpaid tier prices at A$65 to A$100 a month for 100 to 300+ GB. Telstra Plus loyalty program earns points on spend, plus premium content bundles (Kayo, Binge, occasional Foxtel plays). Telstra International Roam plans across 100+ destinations.

Where Telstra wins: regional and remote coverage, faster average urban 5G speeds in independent testing, premium content bundle value if you already consume the streaming services, retail store presence for support.

Where Telstra loses: A$10 to A$30 a month premium over Optus and Vodafone Australia on comparable data tiers. For metro-only users, the premium is often not justified.

Cashback via ShopBack on Telstra at the current published rate on eligible plan sign-ups.

Optus

Optus is the second-largest Australian mobile operator, owned by SingTel. Mainstream postpaid tier prices at A$60 to A$85 a month for 100 to 300 GB. SubHub bundles Netflix, Paramount+, Binge, Kayo, and other streaming services into the plan at a discounted aggregate. Optus loyalty programs and Optus Sport streaming bundle. Optus Roam plans for international.

Where Optus wins: metro coverage functionally equivalent to Telstra for most users, SubHub streaming value if you already pay for the services, price 5 to 20 percent below Telstra on comparable data tiers.

Where Optus loses: regional WA, NT, remote QLD coverage weaker than Telstra retail, historical network resilience concerns (2022 outage, 2023 outage) have driven some churn to competitors.

Cashback via ShopBack on Optus at the current published rate on eligible plan sign-ups.

ShopBack callout 1

Postpaid sign-up cashback is one of the highest-yield categories on ShopBack Australia. Bundle the household mobile switch onto a single session: activate on the ShopBack app, click through to each carrier in turn, complete each sign-up. Verify current published rates on Telstra via ShopBack, Optus via ShopBack, Vodafone via ShopBack, and eligible Belong and TPG merchant pages before committing.

Vodafone Australia

Vodafone Australia (part of TPG Telecom following the 2020 merger) is the third-network primary retailer. Mainstream postpaid tier prices at A$55 to A$75 a month for 100 to 200 GB. Vodafone Rewards loyalty program earns rewards on spend, plus content bundles and Vodafone TravelPass for international.

Where Vodafone Australia wins: metro Sydney, Melbourne, Brisbane, Perth coverage strong, competitive plan pricing, network refresh via TPG Telecom investment through 2024-2026 has improved 5G footprint.

Where Vodafone Australia loses: regional coverage weakest of the three networks, historical brand-perception challenges.

Cashback via ShopBack on Vodafone Australia at the current published rate on eligible plan sign-ups.

TPG (Australia)

TPG (Australia) is TPG Telecom's Australian value-tier mobile brand on the Vodafone network. Plans price at A$35 to A$50 a month for 60 to 100 GB. The proposition is Vodafone-network coverage at a below-Vodafone-direct price point, targeting price-conscious postpaid buyers who do not want the MVNO experience.

Where TPG (Australia) wins: value-tier pricing on the Vodafone network with direct-brand plan mechanics (not white-label MVNO), TPG Telecom internet bundling if you already have TPG NBN.

Where TPG (Australia) loses: Vodafone-network coverage limitations same as Vodafone Australia direct.

Cashback via ShopBack on TPG (Australia) availability varies; verify current published rate on the merchant page. Note: TPG (Australia) is distinct from SIMBA in Singapore under Tuas Limited.

Belong

Belong (Telstra-owned) is the standout MVNO in this 5-way because it sits close enough to the postpaid experience (month-to-month, direct brand relationship, straightforward plan mechanics) that it deserves comparison against the three networks. Plans price at A$25 to A$55 a month for 20 to 80+ GB on the Telstra wholesale network.

The differentiator is the Belong 40GB banking plan tier at A$25 to A$30 a month with data-bank rollover into the next billing period (subject to Belong's plan-tier caps and expiry rules). For low-usage lines, backup SIMs, or holiday months, the banking mechanic prevents the data from expiring unused.

Where Belong wins: 40GB banking plan tier is one of the best-value postpaid-adjacent options in Australia for a low-usage or backup line, straightforward month-to-month, no lock-in.

Where Belong loses: Telstra wholesale coverage (not full Telstra retail like Boost), no premium content bundles.

Cashback via ShopBack on Belong at the current published rate on eligible plan sign-ups.

ShopBack callout 2

Belong's 40GB banking tier pairs well with a second-line SIM strategy. Households running one high-data line on Telstra or Optus postpaid can add a Belong 40GB banking backup line for A$25 to A$30 a month with cashback via ShopBack at the current published rate. The banking data rolls over during low-usage months, effectively increasing the household data pool without paying for a premium tier.

5-way comparison table (indicative mid-2026)

Carrier	Network	Owner	Mid-tier monthly	Best for
Telstra	Telstra retail	Telstra Corp	A$65 to A$100 for 100 to 300 GB	Regional and remote, premium bundle
Optus	Optus	SingTel	A$60 to A$85 for 100 to 300 GB	Metro + SubHub streaming stack
Vodafone Australia	Vodafone	TPG Telecom	A$55 to A$75 for 100 to 200 GB	Metro Vodafone Rewards
TPG (Australia)	Vodafone	TPG Telecom	A$35 to A$50 for 60 to 100 GB	Metro value-tier
Belong	Telstra wholesale	Telstra Corp	A$25 to A$55 for 20 to 80 GB	40GB banking backup line

Plan pricing changes frequently. Verify on each carrier's site before signing.

Coverage: match the network to where you live and travel

The rule of thumb:

• Metro only: All three networks and the two adjacent brands work. Pick on plan price and features.
• Regional NSW, Victoria, SA within 100km of a major city: Telstra and Optus networks both work; Vodafone-network (Vodafone Australia direct or TPG Australia) weaker.
• Regional WA, NT, QLD north of Rockhampton, remote areas: Telstra retail (Telstra direct or Boost Mobile MVNO) preferred; Telstra wholesale (Belong, Aldi Mobile) works but smaller footprint; Optus workable in some areas; Vodafone-network patchy.
• Frequent driver on the Hume, Pacific, Bruce, or Newell Highway: Telstra network preferred; Optus workable; Vodafone patchy.

Use the ACMA outdoor coverage checker at acma.gov.au to verify your specific suburb and travel routes before switching.

Family plans and multi-line discounts

Telstra, Optus, and Vodafone Australia all offer multi-line family discounts that reduce the per-line cost by 10 to 25 percent on 3 to 5 line stacks. Telstra's multi-line credit typically applies as a monthly account credit; Optus and Vodafone Australia offer tiered plan-count discounts.

For a family of four on Optus at A$75 a month each individual price, the family-plan effective rate can land around A$60 a month per line, saving A$60 a month across the household (A$720 a year).

Compare against switching all four lines to matching MVNOs at A$25 a month per line: A$40 a month per line saving vs family postpaid, or A$1,920 a year household. The MVNO switch is typically the larger household saving unless the postpaid bundle value (streaming, roaming, retail store support) is genuinely used.

ShopBack callout 3

For families running a multi-line switch decision (postpaid family plan vs 4x MVNO), stack cashback via ShopBack on whichever direction wins. Postpaid: cashback on Optus via ShopBack, Telstra via ShopBack, Vodafone via ShopBack at the current published rate. MVNO: cashback on Boost via ShopBack, Aldi Mobile via ShopBack, Amaysim via ShopBack, Felix via ShopBack at the current published rate.

eSIM, dual-line, and iPhone 18 / Galaxy S26 / Pixel 11 stacking

All five carriers support eSIM activation in 2026. eSIM enables dual-line setups on iPhone 18 Pro, iPhone 18 Pro Max, Samsung Galaxy S26, and Google Pixel 11 with a work postpaid on eSIM and personal MVNO on physical SIM, or vice versa.

The common household stack:

• Line 1 (work): Telstra or Optus postpaid on eSIM with premium coverage and streaming bundle.
• Line 2 (personal): Belong 40GB banking or Aldi Mobile on physical SIM at A$25 to A$30 a month.

Total household telco cost for the dual-line: A$85 to A$115 a month vs A$130 to A$170 for two premium postpaid lines.

Cashback via ShopBack on both the postpaid sign-up and the MVNO sign-up applies at the current published rate on each merchant page. Coordinate the sign-ups in the same 7-day window to consolidate the cashback pending payout.

Verdict by user type

The regional or remote user: Telstra direct postpaid at A$65 to A$100. Cashback via ShopBack on Telstra via the merchant page at the current published rate can offset the first month.

The metro user who values streaming: Optus postpaid at A$60 to A$85 with SubHub bundle if you already pay for the bundled services separately. Cashback via ShopBack on Optus at the current published rate.

The metro user who wants value on Vodafone network: TPG (Australia) at A$35 to A$50. Cashback via ShopBack on TPG at the current published rate.

The low-usage backup line: Belong 40GB banking plan at A$25 to A$30. Cashback via ShopBack on Belong at the current published rate.

The household running the deep-saving switch: All four lines to matching MVNOs (Boost, Aldi Mobile, Amaysim, Felix, OnePass Mobile), saving A$1,800 to A$2,800 a year. See the ShopBack Australia 5-way MVNO comparison for the MVNO-only breakdown.

Frequently asked questions

Q: What is the cheapest postpaid mobile plan in Australia in 2026?

Cheapest of the five in the standard mid-tier band is TPG (Australia) on the Vodafone network at A$35 to A$50 a month for 60 to 100 GB. Belong on the Telstra wholesale network sits close at A$45 to A$55 a month for similar allocations, with the differentiator being the Belong 40GB banking plan tier at A$25 to A$30 a month for low-usage backup lines. Vodafone Australia direct at A$55 to A$75. Optus at A$60 to A$85 with SubHub. Telstra premium at A$65 to A$100. Cashback via ShopBack on eligible sign-ups at the current published rate can offset the first month. For cheapest per-GB overall, MVNOs at A$15 to A$35 remain cheaper still.

Q: Is TPG Australia the same as SIMBA in Singapore?

No. TPG Australia is TPG Telecom's Australian mobile operation on the Vodafone network under TPG Telecom (ASX ticker TPG). SIMBA in Singapore is a separate brand under Tuas Limited that provides mobile services in Singapore only. There has been consumer confusion because TPG Telecom held Singapore assets at various times, but the current SIMBA and current TPG Australia mobile are operationally distinct in 2026. Cashback via ShopBack on TPG Australia sign-ups at the current published rate on the ShopBack merchant page.

Q: What is the Belong 40GB banking plan in Australia?

Belong's 40GB banking plan tier lets you carry over unused monthly data into the next billing period (subject to plan-tier caps and expiry rules that Belong publishes on the plan page). The mechanic is aimed at low-usage months and short-trip holiday periods. At around A$25 to A$30 a month for 40GB with data-bank rollover on the Telstra wholesale network, the plan is one of the best-value postpaid tiers in Australia for a low-usage line or backup SIM. Verify current plan terms and data-bank cap on belong.com.au. Cashback via ShopBack on eligible Belong sign-ups at the current published rate.

Q: Is Telstra worth the premium over Optus and Vodafone in Australia in 2026?

Telstra sits A$10 to A$25 a month above Optus and A$15 to A$30 a month above Vodafone Australia on comparable postpaid tiers. The premium buys deepest regional and remote coverage, faster average urban 5G speeds, and Telstra Plus loyalty benefits. For metro-only users, Optus and Vodafone Australia coverage is functionally equivalent, and the premium is not worth it. For users regularly travelling regional NSW, Victoria, WA, NT, or Queensland north of Rockhampton, the Telstra premium is often justified. Cashback via ShopBack on Telstra plan sign-ups at the current published rate can offset the premium in the first month.

Q: How much is Optus SubHub actually worth on a mobile plan?

SubHub bundles Netflix, Paramount+, Binge, Kayo, and other streaming services into the Optus mobile plan at a discounted aggregate. Value depends on which services you already pay for: if you already subscribe to Netflix Standard and Binge separately, the SubHub-bundled equivalent through Optus mobile can save A$15 to A$25 a month effective, offsetting a chunk of the Optus plan premium over MVNO alternatives. If you do not currently pay for any bundled services, SubHub is not free value; you are paying for streaming you did not want. Verify current SubHub tier pricing and cashback via ShopBack on eligible Optus sign-ups at the current published rate.

Q: How much do family plans save on Australian postpaid mobile in 2026?

Multi-line family discounts on Telstra, Optus, and Vodafone Australia typically save 10 to 25 percent per line versus individual pricing, on 3 to 5 line stacks. For a family of four on Optus at A$75 a month each individual price, the family-plan effective rate can land around A$60 a month per line, saving A$60 a month across the household or A$720 a year. Compare against switching all four lines to matching MVNOs at A$25 a month per line: A$40 a month per line saving vs family postpaid, or A$1,920 a year household. Cashback via ShopBack on eligible sign-ups at the current published rate applies to both.

Q: Which Australian postpaid carriers support eSIM in 2026?

Telstra, Optus, Vodafone Australia, TPG, and Belong all support eSIM activation on compatible iPhone, Samsung Galaxy, and Google Pixel devices in 2026. eSIM removes physical SIM swap and enables dual-line setups on iPhone 18 Pro, Samsung Galaxy S26, and Google Pixel 11. Some older devices still require physical SIM; check the carrier's device compatibility page before signing. Cashback via ShopBack on eligible eSIM postpaid sign-ups at the current published rate on the merchant page applies the same as physical SIM sign-ups.

Q: How long does postpaid mobile porting take between Australian carriers?

Number porting between Australian postpaid carriers typically completes within 2 to 4 hours during business hours and within 24 hours outside business hours. The ACMA mandates the porting process. You keep your existing number; the new carrier handles the port when you activate the new SIM. Do not cancel your current plan until the port completes. Have your current mobile number, account number, and account verification detail on hand. If the port stalls beyond 48 hours, contact the new carrier first, then the Telecommunications Industry Ombudsman. Cashback via ShopBack confirms after the first billing cycle completes.

Q: How much cashback can I earn on Australian postpaid sign-ups in 2026?

Cashback via ShopBack on Australian postpaid mobile sign-ups depends on the current published rate at each eligible carrier on the day. Telstra, Optus, Vodafone Australia, and other carriers appear on ShopBack Australia with rates that vary by carrier and by promotional period. Sign-up bonuses regularly appear as first-month or fixed-dollar cashback offers that can offset the first month. Verify the current rate on the ShopBack merchant page before activating tracking and clicking through. Cashback pending shows in a few days and confirms after the first billing cycle completes.

Q: What is the biggest 5-way postpaid switching mistake in Australia in 2026?

The single biggest 2026 mistake is switching between the three network operators (Telstra, Optus, Vodafone Australia) for a marginal A$5 to A$15 a month saving when the actual big-saving switch is to an MVNO at half the postpaid price. Boost, Aldi Mobile, Amaysim, Felix, or OnePass Mobile on the same underlying network as your target postpaid carrier saves A$30 to A$60 a month per line for equivalent day-to-day use. The MVNO trade-off is retailer store presence, some premium content bundles, and international roaming on the same account. If you value the postpaid stack, pick the network that matches your coverage need; if you value price, switch to MVNO. Cashback via ShopBack on eligible sign-ups at the current published rate applies to both.

Ready to switch

Start with cashback active at your chosen carrier before you click through:

• Telstra via ShopBack
• Optus via ShopBack
• Vodafone Australia via ShopBack
• Belong via ShopBack

Not a ShopBack member yet? Sign up free at shopback.com.au. Pin the app to your phone home screen so activation is a two-tap step before every mobile plan sign-up.

About this article

As of 2026-09-12, postpaid mobile plan pricing, data allocations, network coverage, and cashback rates change frequently. Verify current pricing on each carrier's Australian site and cashback rate on the merchant's ShopBack page before switching. TPG (Australia) is TPG Telecom's Australian mobile brand on the Vodafone network and is distinct from SIMBA in Singapore under Tuas Limited. Belong is the Telstra-owned MVNO on the Telstra wholesale network. ShopBack receives a commission when readers complete purchases through a cashback link. This commission does not vary by editorial coverage.

The views expressed here are those of the author and are for general informational purposes only. This is not professional financial or telecommunications advice.