SIM only from iD Mobile sits in the budget end of the UK networks, running on Three’s coverage and competing with the likes of Smarty, Voxi and giffgaff for big-data, low-commitment plans. This one centres on a generous 50GB allowance with unlimited minutes and texts, aimed at people who want plenty of mobile data without paying for a handset.

Who is this plan for?

It suits commuters and streamers who regularly use maps, social apps and video on 4G or 5G, and anyone happy to bring their own phone. EU roaming is included, which matters if you travel and want to use your allowance for navigation and messaging without hunting for Wi‑Fi.

  • 50GB data: enough for regular streaming and hotspot use in moderation.
  • Unlimited minutes and texts: no need to watch call or message limits.
  • EU roaming: useful for short trips where mobile data is essential.

Note that the effective cost depends on successfully tracking and claiming cashback, so factor in the admin and waiting time.