18 Top Mobile Carriers

How to choose a mobile carrier

Coverage matters more than the headline price. Many low-cost brands do not own towers; they buy access from a larger network. Find out which network a carrier uses and check its coverage map for your home, work and regular routes. Reviews from people in your area help here, and on CandorRated you can filter companies by country and city.

• Phone compatibility: confirm your phone is unlocked and supports the carrier's network before you switch.
• Data priority: some plans get slower speeds when the network is busy. The plan terms usually say so.
• Price after promotions: look at the price after any introductory months, plus taxes and fees.
• Prepaid or contract: prepaid plans are easier to leave; device payment plans can tie you in until the phone is paid off.

Problems customers report, and how to prevent them

Number transfers cause many complaints. Do not cancel your old service until the new one is active, or you can lose the number. Ask your current carrier for your account number and transfer PIN first.

Unauthorized SIM changes are another risk. Set up a PIN or passcode on your account so no one can move your number without it. If your phone suddenly loses service for no clear reason, contact the carrier from another phone right away.

Frequently asked questions

Will my number move with me?

In most countries you can keep your number when you switch. Start the transfer with the new carrier, not by cancelling the old one.

Why is my speed slower than on another brand using the same network?

Network owners can give their own customers priority when towers are busy. Check the plan's terms for data priority.

Is an eSIM safer than a physical SIM?

Both can be moved by someone who gets into your account. An account PIN and a strong password matter more than the SIM type.