The 5-Point Checklist to Run Before Switching Carriers
Switching carriers can genuinely save hundreds of dollars a year — but a rushed switch can also leave you with worse coverage, surprise charges, or a phone that won't work on the new network. Run these five checks first and the switch becomes routine.
1. Check real coverage where you actually live and work
Carrier coverage maps are optimistic by design. Better sources: ask neighbors and coworkers on that network how their service is inside your home and office, and check whether the new carrier offers a free trial. Several carriers let you test their network on your current phone via eSIM for a week or more without switching anything.
2. Confirm your phone is unlocked and compatible
A phone that's still under a financing agreement or within a promo period may be carrier-locked. Contact your current carrier and ask for the unlock status in writing, and use the new carrier's online compatibility checker with your phone's IMEI number (dial *#06# to find it).
3. Read the fine print on the switching promo
"We'll pay off your phone" offers usually arrive as rebate cards after 30–90 days, require you to trade in your old device, and require you to stay on a specific (often premium) plan. None of that makes the offer bad — but know the real terms before you count the savings.
4. Do the early-termination math
Add up what leaving actually costs: remaining device payments (which typically become due immediately), any promo credits you forfeit, and activation fees at the new carrier. Compare that total against your 12-month savings. Sometimes the right answer is "switch in four months when the phone is paid off."
5. Port your number — never cancel first
This is the one mistake that can't be undone: if you cancel your old account before porting, your number can be lost. Sign up with the new carrier first and let them initiate the transfer. Your old account cancels automatically once the port completes. See our full guide on keeping your phone number when you switch.