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(Pocket-lint) - Ordered a new phone? Such as the new Samsung Galaxy S21, S21+ or S21 Ultra? Perhaps even iPhone 12, OnePlus Nord 9, or even a Xiaomi Mi?

Or are you just in the market for a great SIM Only deal? It's an idea time to switch as there are some good plans around, and we've rounded up the best below.

Over the past few years, SIM contracts have seen something of a resurgence. These SIM Only deals allow you to move networks easily and give you great value for money; they're available either on a 12-month, or even rolling monthly plans. 

These SIM-only arrangements are also ideal if your contract is up and you want to save money by not upgrading to a new phone, or you'd rather buy a mobile phone SIM free.

The best SIM Only deals

On this page we'll bring you the best SIM only deals selected from EE, Three, Vodafone, O2, Giffgaff and more, all saving you the time and effort of hunting around for these very offers

The best deal for heavy data users

Three unlimited data for just £16
EE 200GB costing £23
O2 unlimited data priced at £15

The best offer for medium data users

Smarty 100GB for £14
Vodafone 100GB priced at £18
giffgaff 100GB coming in at £20

The best deal for low data users

Vodafone 4GB for £6
iD Mobile 4GB costing £6
Sky Mobile 6GB at just £8

Compare the cheapest SIM only deals

Couldn't find a SIM deal above? Here you can compare all the best SIM only deals available right now. You can use the sliders and menus to choose the best deal that suits your needs.

Writing by Rob Kerr. Originally published on 9 August 2016.