Buying guide
Buying an unlocked phone: the no-regrets guide
Quick answer
An unlocked phone works with any compatible carrier — pop in any SIM or eSIM and it connects. A locked phone only works on the carrier that sold it until that carrier removes the lock. Unlocked phones cost a little more up front but give you carrier freedom, easier travel, and better resale value.
Buying a used or unlocked phone is the single best way to skip a $30-plus-per-month installment plan — if you know what to check before money changes hands. This guide covers what "unlocked" actually means, the traps that catch people, and the two-minute checks that protect you.
Locked vs. unlocked, in plain English
When a carrier sells you a phone on an installment plan, it usually installs a software lock so the phone rejects other carriers' SIM cards until the device is paid off and an unlock is processed. That's a locked phone. An unlocked phone has no such restriction — it will register on any network whose radio bands it supports.
Two flavors of unlocked matter when you're shopping:
- Factory unlocked — sold unlocked from the start (straight from Apple, Samsung, Google, or a retailer's "unlocked" listing). Never carrier-tied, usually the fullest band support. The safest buy.
- Carrier unlocked — started life locked to a carrier, later unlocked after payoff. Works fine with other carriers, but you should verify the unlock rather than take the seller's word, and some carrier variants differ slightly in supported bands or features.
Why unlocked is worth it
- Carrier freedom — switch to any plan, any time. Prepaid carriers like T-Mobile Prepaid, Verizon Prepaid, Simple Mobile, and Ultra Mobile all require or strongly favor unlocked phones.
- No monthly device payment — you own it outright. Nothing to pay off, nothing that can get the IMEI flagged for non-payment.
- Travel — drop in a local SIM or eSIM abroad instead of paying roaming rates.
- Resale value — unlocked phones sell faster and for more, because any buyer on any carrier can use them.
How to verify a phone is actually unlocked
Check the settings (iPhone)
Settings → General → About → scroll to Carrier Lock. If it says "No SIM restrictions," the phone is unlocked. Anything else means it's locked or the status is unclear.
The SIM test (any phone)
Insert a SIM from a different carrier than the one the phone was sold on. If it picks up signal and can place a call or use data, it's unlocked. This is the definitive test — software menus can lag behind reality.
Run the IMEI
Dial *#06# to get the IMEI, then run it through an IMEI checker. Depending on the check, you can see the device's model details, lock status, and whether it's been blacklisted. Our IMEI guide covers every way to find the number.
The used-phone danger list
These are the four ways a used-phone deal goes bad — all avoidable with checks that take minutes:
| Risk | What happens | How to protect yourself |
|---|---|---|
| Blacklisted IMEI | Phone was reported lost/stolen — it won't activate on US carriers | IMEI blacklist check before paying |
| Unpaid balance | Seller still owes the carrier; IMEI can be blacklisted weeks after the sale | Financial-status IMEI check; buy from accountable sellers |
| Activation lock | Find My iPhone / Google account lock makes the phone unusable without the seller's password | Watch the seller sign out and factory reset in front of you |
| Hidden damage | Bad battery, flickering screen, broken Face ID, water damage | Test everything in person; check battery health |
The 5-minute pre-purchase checklist
- Run the IMEI — blacklist, lock status, model match.
- Confirm activation lock is OFF (Apple ID / Google account signed out, phone factory reset).
- Test screen touch, cameras, speakers, mic, charging port, Face ID / fingerprint.
- Check battery health (iPhone: Settings → Battery → Battery Health).
- Match the IMEI on the box/tray to the one in settings — a mismatch means swapped parts or a shady history.
Skip the risk — buy tested, in person
Every phone we sell at the counter is IMEI-verified, tested in front of you, and ready for any prepaid carrier we activate in-store.
See phones in stockFAQ
What does an unlocked phone mean?
It isn't restricted to one carrier — any compatible SIM or eSIM works, including prepaid brands. A locked phone rejects other carriers' SIMs until the original carrier unlocks it.
How can I tell if a phone is unlocked?
iPhone: Settings → General → About → Carrier Lock should read "No SIM restrictions." Any phone: insert a different carrier's SIM — signal and calls mean unlocked. An IMEI check can also report status.
Is factory unlocked better than carrier unlocked?
Both accept any SIM. Factory unlocked was never carrier-tied and is the safest buy; carrier unlocked works fine but verify the unlock happened and know some carrier variants differ in band support.
Can a used phone be blacklisted after I buy it?
Yes — if the seller stops paying it off or files a false lost/stolen claim, the IMEI can be flagged weeks later. Buy from sellers you can hold accountable or a shop that guarantees clean IMEIs.
Do unlocked phones work with prepaid carriers?
Yes — that's a big reason to buy one. We activate T-Mobile Prepaid, Verizon Prepaid, Simple Mobile, Ultra Mobile and more in-store in 15–30 minutes.
What should I check before buying from a stranger?
IMEI check, activation lock signed out, full hardware test, battery health, and IMEI match between settings and the SIM tray or box. Never pay first.
Related reading: How to find your phone's IMEI · What an ESN / IMEI check actually tells you
Have a phone to sell instead? Get cash today — we test it in front of you at 1054 Beach 20th Street and pay on the spot.