Guides for picking a UK network.

The comparison pages tell you who a brand suits. These guides answer the questions people ask before they click a shop button.

Checked September 2026.

Start here

EE, O2, Vodafone and Three are the hosts. Every other brand rides one of them.

Host network guide

SIM or phone

When to keep your phone and when a contract handset is the honest choice.

Read the guide

Switching

PAC codes, keeping your number, and checking coverage before you leave.

Switching guide

Work

When a consumer SIM is fine, and when EE, O2 or Vodafone Business is the point.

Business guide

Travel

Home-network roaming versus travel eSIMs such as Ubigi and Airalo.

Roaming guide

Side-by-side compares

Short, opinionated, then official shop buttons.