September 13, 2026
Switching phone carriers: what actually changes
Keeping your number, coverage, contracts and fees explained, using the real terms attached to the 57 live plans we track.
Every price below comes from an operator feed we import, with the date it was last verified. Links marked “See this deal” are affiliate links: we may earn a commission if you sign up, at no extra cost to you, and it never changes our ranking.
Your number comes with you
Number portability is a legal right in the U.S. You keep your existing service running, open the new account, give the new carrier your account number and transfer PIN from the old one, and the old line closes automatically once the port completes. Cancelling first is the one mistake that can lose the number.
Coverage is the thing that really changes
Price differences between carriers are often small; coverage differences are not. The plans we track run on 4 different host networks. Switching between two carriers on the same host network usually means no coverage change at all.
Contracts, fees and the first month
57 of the plans we track state no fixed contract term. Where a term exists we show its length on the plan page.
The costs that catch people out are the one-off ones: activation or SIM fees on the new plan, and any device balance still owed on the old one. Each plan page shows the activation fee and the first-month total next to the monthly price.
What does not change
Your handset almost always works, provided it is unlocked and supports the new network's bands. Your existing contacts, messages and apps are unaffected — only the SIM or eSIM profile changes.
Prices change daily. Read the latest round-up or compare every live plan.