Big Networks or Idmobile? A Fair Look at What the Bill Comes To

A straight comparison of Idmobile against the SIM deals most UK buyers shortlist: bill capping, data rollover, roaming in 50 destinations, Three-network coverage and free PAC switching.

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Four things that decide the real cost of a SIM

Headline monthly price is the easiest number to compare and the least useful on its own. What shapes the bill you end up paying is narrower: what happens when you go past your allowance, what happens to data you paid for and did not use, what the phone costs you abroad, and how long you are tied in.

Idmobile is a British mobile virtual network operator running on the Three network. It was founded on 12 May 2015, is headquartered in London, and its parent company is Currys plc. The tagline is "Mobile done right", with a focus on value packages and simple features.

That matters when you set it beside the better-known networks, because several things a shopper often treats as paid extras are listed here as standard across the plans. Line them up one by one and the comparison gets easier to make.

Bill capping and rollover: two features, both included

The first worry for most bill-payers is the month the bill lands bigger than expected. Bill capping is included on Idmobile plans, so spending control sits inside the plan rather than being something you have to police yourself.

The second is unused data. Idmobile offers rollover of unused data allowance to the next month, available on all its pay monthly plans. Rollover data expires after one month, so it is a one-month grace rather than a pot that builds forever, but a quiet month is not simply written off.

Tethering is also listed as a plan feature, so the allowance can feed a laptop or tablet rather than sitting on the handset alone. Those are the two levers an ordinary household cares about most: not overspending, and not wasting what has already been paid for. Both arrive with the plan.

Abroad: roaming that comes with the plan

Inclusive roaming is included as standard on all Idmobile plans. That means using your inclusive UK minutes, texts and data in 50 roaming destinations, with a 30GB fair usage data cap applying while roaming.

It goes a step further. Rolled-over data and data add-ons can be used abroad as well, provided your total roaming data stays under 30GB for the month. The allowance you saved in one month is available in the next, at home or in one of the 50 destinations.

Travelling outside that list is handled separately. Roam Beyond data add-ons cover a further 50 countries beyond the inclusive roaming zone. For anyone weighing a plan against an alternative where roaming is bought on top, this is the point where the sums shift, because the feature is already part of what you signed up for.

Coverage and contract length: the practical questions

Coverage is the usual sticking point when a buyer considers a smaller name. Idmobile runs on the Three network and states that its network covers 99% of the UK outdoor population.

On commitment there is a spread rather than one option. Pay monthly contracts with a handset run over 24 months. SIM-only contracts come in 1, 12 and 24 month terms, so a one-month rolling SIM is there if you want to keep your options open. Pay As You Go SIMs are also offered, with unlimited calls and texts for 30 days plus your choice of data in a one-off payment, no contract to sign and no credit check.

SIMs and eSIMs are both available. Plans can be bought online, through Idmobile telephone sales, or in a Currys or Carphone Warehouse store. Accounts are then managed through the Idmobile app or My Account.

Moving across costs nothing and finishes by 10pm

The last reason people stay put is the hassle of switching, and it is short. To keep your number, text the word PAC to 65075 while using the SIM from your old network; your PAC comes back by text. To start fresh with a new number, request a STAC instead.

You hand the code over during checkout when you choose your new plan or phone, or later by logging in to the Idmobile app or my.idmobile.co.uk and selecting "Switch to iD" on your Plan screen. The switch happens on the date you selected, by 10pm. Switching to Idmobile using a PAC is free of charge. Pay As You Go customers have 30 days to provide theirs.

After that, the app handles account management, spending control, usage tracking and rewards, with bills viewable and payable under My Billing. Bill capping, rollover and inclusive roaming, moved across tonight at no cost.