Vodafone
Host network
Zensim runs on the Vodafone (TPG) 4G and 5G network. You get the same towers as Vodafone customers, at a lower price, because Zensim is a reseller rather than a network operator.
Provider overview
Provider overview
Zensim mobile: cheap eSIM-only plans
Zensim is a small, online-first Australian mobile provider (MVNO) that sells cheap, eSIM-only prepaid plans on the Vodafone 4G and 5G network. There are no physical SIM cards and no lock-in contracts: you sign up, activate and manage everything from the app, and you pay monthly on the same calendar date rather than on a rolling 28-day cycle. It is built for budget-minded users who want a simple, no-frills plan and quick online support. Here is everything you need to know about Zensim plans, coverage and customer service before you decide.
Vodafone
host network
98.4%
population coverage
eSIM
only, no physical SIM
No
lock-in contract
Everything Zensim
Explore Zensim mobile
Jump straight to what you need: network and coverage, plans and pricing, contact details, reviews and how to sign up.
Coverage
Zensim mobile network & coverage
Zensim does not run its own towers. As an MVNO, it resells the Vodafone (TPG) network, so its coverage matches the Vodafone footprint rather than the largest network. That footprint has grown a lot recently, which makes Zensim a much safer budget pick than it once was.
98.4%
Population coverage
After a network-sharing deal with Optus, Vodafone coverage rose from about 95.4% to roughly 98.4% of the population, expanding to around 1 million square kilometres and many more regional sites.
5G
On the top plans
The smaller entry plans use 4G, while the larger Zensim plans add 5G on the Vodafone network. Standard plans cap full-speed data; the endless-data tier slows speeds after your allowance rather than charging excess.
Check before you sign up. Because Zensim uses the Vodafone network, coverage can be weaker in some remote areas than on the largest network, so always check the coverage map for your exact address. To weigh Zensim against other budget MVNOs, see our mobile providers guide.
The plans
Zensim mobile plans explained
Zensim keeps a small, simple range of eSIM-only prepaid plans, all with no lock-in contract. Entry SIM-only plans start from around the low-$20s per month and rise with your data allowance, with separate travel eSIMs for trips overseas.
Entry eSIM
20 GB
$25/mo
- Vodafone 4G network
- Unlimited national talk & text
- Data bank rollover
- No lock-in contract
Mid eSIM
40 GB
$35/mo
- Vodafone 4G & 5G
- Included international minutes
- Data bank rollover
- No lock-in contract
Large eSIM
70 GB
$45/mo
- Vodafone 4G & 5G
- Included international minutes
- Data bank rollover
- No lock-in contract
XL eSIM
100 GB
$65/mo
- Vodafone 4G & 5G
- Endless-data option (slowed after allowance)
- Included international minutes
- No lock-in contract
Indicative pricing as of June 2026. Always check Zensim for current plans and inclusions.
The Zensim plan range explained
Beyond the headline prices, the range breaks down into four clear groups so you can match a plan to how you actually use your phone.
Entry SIM-only (smaller data)
The cheapest tier: a modest monthly data allowance on the 4G network, unlimited standard national calls and texts, and a generous data bank so unused data rolls over instead of being lost.
Mid SIM-only (more data + international)
Larger data allowances plus a block of included international calling minutes to selected countries, on top of unlimited standard national calls and texts, for regular users who also call overseas.
Top SIM-only (5G + endless data)
The top tiers add 4G and 5G access, the largest data allowances and an endless-data option where speeds are slowed once your full-speed allowance is used rather than charging excess usage.
Travel eSIMs
Separate data-only travel eSIMs for short trips overseas, with single-country and multi-country options, activated digitally before you fly so you avoid roaming charges and local SIM purchases.
Good to know about Zensim plans
Three features set Zensim apart from many cheap providers and make its plans easier to live with day to day.
Data bank (rollover)
Most plans bank your unused data, so a quiet month is not wasted and you build a buffer for heavier months.
Monthly billing, not 28 days
Zensim charges on the same calendar date each month rather than on a rolling 28-day cycle, so there is no surprise 13th bill in a year.
Usage alerts
The app sends notifications as you reach 50%, 80% and 100% of your allowance, so you can top up or upgrade before you run out.
Good to know. Every Zensim mobile plan is eSIM only and prepaid with no lock-in, so you can change or leave through the app without an exit fee. Higher tiers add 5G and included international calling minutes. For live pricing and exact inclusions, always check the current Zensim plan pages, as figures change.
Get in touch
How to contact Zensim
Zensim is online-first and has no public call centre. Support runs through messaging and the app, and customers consistently report fast, friendly replies. The quickest channel for most queries is WhatsApp or Messenger.
| Channel | How to reach it | Notes |
|---|---|---|
| Message Zensim on WhatsApp | Primary channel, often replies fast even out of hours | |
| Facebook Messenger | Message via Messenger | Same team, same quick replies |
| In-app support | Zensim app | Manage your plan and chat to support |
| Email & contact form | zensim.com.au/contact | For account and billing queries |
No phone hotline
Unlike the big telcos, Zensim does not publish a call-centre number. That keeps costs down and, in practice, support over WhatsApp and Messenger is often faster than waiting on hold elsewhere.
Manage everything in the app
View usage, recharge, change plan, install your eSIM and chat to support from the Zensim app, or use the contact form at zensim.com.au/contact for account and billing queries.
Budget
value pick
High/5
ProductReview
eSIM
only
Zensim reviews: is Zensim worth it?
Zensim is a small challenger brand that reviews well. On ProductReview it holds a very high rating across hundreds of reviews, with customers praising the foolproof eSIM setup, fair prices and fast, personal support over WhatsApp and Messenger. The main caveats are that it is eSIM only, so your phone must support it, and that coverage, like any Vodafone-network plan, can be weaker in remote areas than on the largest network. If you want a cheap, simple plan and you are comfortable managing it online, Zensim is a strong budget choice.
"What set them apart was the customer service. We had an issue with the eSIM, I messaged via WhatsApp out of hours, and someone replied almost straight away. What a refreshing change for a telco." — Sarah, ProductReview
Joining Zensim
How to sign up & activate your eSIM
Getting started with Zensim is fully online and takes minutes, as long as your phone supports eSIM. There is no SIM card to wait for in the post.
Sign up & activate
First, check your phone supports eSIM. Then choose a plan on the Zensim website or app and pay. You receive a unique eSIM QR code by email or in the app, scan it to install the eSIM, pick your plan and you are connected, with no physical SIM to insert.
Bring your number & recharge
To keep your existing number, choose the transfer (port) option during sign-up and follow the prompts in the app. After that, your plan renews monthly on the same calendar date, and you manage recharges, upgrades and the data bank entirely in the Zensim app.
Common questions
A Selectra expert answers your most common Zensim questions
Zensim runs on the Vodafone (TPG) 4G and 5G network. Following a network-sharing agreement with Optus, Vodafone coverage now reaches about 98.4% of the Australian population, up from around 95.4%, with far more regional sites than before. Always check coverage for your exact address before signing up, as reception still varies in remote areas.
Zensim is eSIM only for its mobile plans, so there is no physical SIM card to post or swap. You activate by scanning a QR code on a compatible phone. Check your device supports eSIM before you sign up, as not every handset does.
Zensim is one of the cheaper providers in Australia, with entry SIM-only plans starting at around the low-$20s per month and rising with your data allowance. All plans are prepaid monthly with no lock-in contract, so you can change or cancel through the app. For current pricing, always check Zensim's plan pages, as figures change.
Yes, on its higher tiers. The smaller entry plans use the 4G network, while the larger plans add 5G access on the Vodafone network with a compatible phone. On standard plans, full-speed data is capped, while the endless-data tier slows your speed once the full-speed allowance is used rather than charging excess usage.
Zensim is online-first and does not run a public call centre. The fastest channels are WhatsApp and Facebook Messenger, where the team often replies quickly even outside business hours, plus in-app chat and the contact form at zensim.com.au/contact. There is no phone hotline to call.
Buy a plan on the Zensim website or app, then you receive a unique eSIM QR code by email or in the app. Scan it on your compatible phone to install the eSIM, choose your plan and you are connected, with no physical SIM to insert.
Zensim is a small challenger brand and scores well for service. On ProductReview it holds a very high rating across hundreds of reviews, with customers praising the easy setup, fair pricing and fast, personal support over WhatsApp and Messenger. The main caveats are that it is eSIM only and that coverage, like any Vodafone-network plan, can be weaker in remote areas than on the largest network.
100% free
Compare
in minutes
Independent comparison
Is Zensim the best value for how you use your phone?
Zensim is one of the cheapest plans on the Vodafone network, but it is eSIM only and may not suit everyone. Compare Zensim against the other budget MVNOs and the major networks to find the plan that matches how you actually use your phone.