Cmobile · Postpaid SIM-only · Telstra network

Cmobile Blue 100GB

$45 a month, 100GB a month. Nothing we track with as much data costs less in the first year.

First year: $540
Two years: $1,080
Average a month: $45
Per GB, year one: $0.45

Same price in year two

eSIM
5G
No lock-in
Charges for extra data

Get it at Cmobile Chart it against others

How it compares

Ranks 31 of 52 for first-year cost among plans with 50GB to 150GB a month.
$0.45 a GB in year one: 8% below the median of $0.49 for similar plans.
6 plans with at least as much data cost less in year one. The cheapest is TPG 100GB, $135 less.

Worth knowing

This plan charges for extra data instead of stopping; that charge is not counted in our totals.
This plan carries a note that a detail wasn't stated or couldn't be read (for example what happens when data runs out), so check the provider's page before you buy.

What you get

Data

100GB a month. Data stops until you recharge or buy more.

Calls and texts

Unlimited standard national calls and messaging

Overseas calls

Some overseas minutes included. Calls and texts to 15 countries are included; the page doesn't say whether they are unlimited

Roaming

Not included

Renews

Postpaid bill a month

Features

5G, eSIM, No lock-in

Extras (not counted in the price)

4G and 5G plan to 150Mbps
Data bank up to 1000GB
No lock-in contract

Data past the allowance uses your data bank first, then is charged at $10 per 2GB block (Cmobile's plans page). Our cost figures don't include any excess data.

Prices come from Cmobile's plans page; its Critical Information Summary was not read, so check it before relying on the details.

Cmobile's C Blue 10GB, 15GB and 29GB plans close on 21 October 2026 and are not added; its C Red (Vodafone) plans are small and not added.

Plans with similar data

Plans with 50GB to 150GB a month, cheapest first year first.

Plans similar to Cmobile 100GB
#	Plan	Data a month	First year	Two years
1	TPG50GB	50GB	$315	$735
2	iiNet50GB	50GB	$315	$735
3	Pivotel50GB	50GB	$315	$735
4	Lyca MobileS 50GB	54GB	$330	$720
5	Tangerine50GB	50GB	$360	$792
6	Moose Mobile50GB	50GB	$360	$720
7	Cmobile100GB	100GB	$540	$1,080

Head to head

Cmobile vs Telstra

Your first year, payment by payment

12 payments in your first year, all at the standard price. That adds up to $540.

Standard price

Every payment in your first year on Cmobile 100GB
Payment	Day	You pay	Data
1	0	$45	100GB
2	30	$45	100GB
3	61	$45	100GB
4	91	$45	100GB
5	122	$45	100GB
6	152	$45	100GB
7	183	$45	100GB
8	213	$45	100GB
9	243	$45	100GB
10	274	$45	100GB
11	304	$45	100GB
12	335	$45	100GB

When the data runs out

100GB included, then stopped.

When the 100GB runs out, mobile data stops until the plan renews or you buy more. You are never charged extra, but you can be left without data late in the month. Data bank up to 1000GB.

Is it good value?

Year one works out at $0.45 a GB, the 40th cheapest of the 115 plans we track.
The price stays the same all year, so there is no deal to run out.
There is no lock-in contract, so you can leave when a cheaper plan turns up.
Calls and texts to 15 countries are included; the page doesn't say whether they are unlimited.

Questions people ask

What network does Cmobile 100GB use?

Cmobile uses the Telstra network. It rents capacity from Telstra, so coverage follows Telstra's towers. Check Telstra's coverage map for your street.

What happens when the deal ends?

There is no deal on this plan right now. It costs $45 a month.

Can I use it overseas?

Not included.

Is there a contract?

No. It has no lock-in contract. It renews on your monthly bill.

How was this checked?

On 14 October 2026, from Cmobile's own pages. Prices older than 30 days are hidden from the comparison. We are not paid by providers to rank them.

Sources

Checked 14 October 2026 on Cmobile's own pages: Cmobile C Blue plans. Always read the Critical Information Summary before you buy.