If you want to use a travel eSIM, a local SIM, or a different carrier, you first need to know whether your phone is unlocked. A locked phone only works with the carrier that sold it, so it can refuse a plan from anyone else. Knowing how to check if a phone is unlocked takes a couple of minutes and can save you from buying a plan that will not connect.
This guide shows the checks for iPhone and Android, how to confirm the result with your carrier, and what to do if the phone turns out to be locked. Menu names change between phone brands, models, and software versions, so the steps below point out where yours may look different.
Why a Locked Phone Matters
A carrier lock is a restriction a carrier places on a phone, often because the phone was sold on a payment plan or with a discount. While the lock is on, the phone accepts SIMs and eSIM profiles only from that carrier.
For travel, that has a practical effect. A locked phone may let you install an eSIM profile and still fail to connect, or it may reject the profile entirely. Unlocked is not the same as eSIM-compatible, though. A phone needs both: hardware that supports eSIM and no carrier lock. Our guide on how to check if your phone supports eSIM covers the compatibility side.
How to Check if a Phone Is Unlocked on an iPhone
On an iPhone running a recent version of iOS, you can check the lock status in Settings without a SIM card:
- Open Settings.
- Tap General, then About.
- Scroll to Carrier Lock.
If it says No SIM restrictions, the iPhone is unlocked. If it shows a carrier name or mentions SIM restrictions, the phone is locked to that carrier. Wording can differ slightly between languages and iOS versions, and older iOS versions may not show this field. In that case, use the carrier check or the SIM test below.
Only your carrier can unlock a locked iPhone. Apple explains the process in its guide on how to unlock your iPhone for use with a different carrier.
How to Check if an Android Phone Is Unlocked
Android has no single setting for carrier lock, so the exact path depends on the brand, the model, and the software version. Where a manufacturer does not document a Settings check, the SIM test or your carrier is the dependable route. The manufacturer guidance below shows what each brand says about locks.
Samsung Galaxy
Samsung says it does not lock its devices to any particular network. A Galaxy phone is network locked only when the carrier or retailer that sold it applied the lock, and the unlock code comes from them. Samsung's support page on network lock on Galaxy phones tells you to contact the original carrier or retailer and give them your IMEI, which you can find under Settings > About phone > Status > IMEI information. The page does not describe a Settings check for lock status, so use the SIM test below or ask the carrier.
Google Pixel
Google's help page on using your Pixel phone with any mobile carrier says that all phones in the Google Store come unlocked, and that a phone bought from a mobile service provider could be SIM-locked for up to 2 years. The page does not describe a Settings check, so for a carrier-bought Pixel, insert a SIM from a different carrier or ask the carrier that supplied the phone.
Other Android brands
Look under Settings for SIM and network, mobile network, or About phone, and search for SIM or network lock. If nothing is clear, use the SIM test or confirm with the carrier. Do not rely on a single menu on a brand you do not know.
Confirm With Your Carrier or Account
The carrier that supplied the phone is the authority on its lock status. Many carriers show unlock eligibility or status in their app or online account, and all of them can confirm it through support. Have your IMEI ready, which is the phone's unique identifier. You can find it by dialing *#06# on the phone, or in the About section of Settings.
Unlock rules vary by carrier and country. They commonly depend on whether the device is fully paid for, how long the account has been active, and whether the phone has been reported lost or stolen. Ask the carrier for its current eligibility rules instead of relying on general advice.
Test With Another SIM
A direct test is to insert a SIM from a different carrier and see whether the phone connects:
- Back up the phone and turn it off.
- Remove your current SIM with the ejector tool and insert the other carrier's SIM.
- Turn the phone on and wait for a network name and signal bars.
If the phone connects, it is unlocked. If it asks for an unlock code or shows an invalid SIM or SIM not supported message, it is probably locked. Only use a SIM you have permission to use, and put your own SIM back afterward. A SIM PIN prompt is not a carrier lock. Samsung explains the difference in its guide to a SIM PIN and a network unlock code: a SIM lock protects the SIM from being used in other devices, while a network lock ties the phone to one provider.
Using an IMEI Checker Safely
Some websites check a phone's IMEI and report its lock status. Results vary in accuracy, and many sites collect data or sell services. If you use one, choose a reputable checker, never enter passwords or account details, and treat its answer as a hint to confirm with your carrier, not a final answer.
What to Do if Your Phone Is Locked
- Ask the carrier to unlock it. Request the unlock through the carrier's official process and keep the reference number.
- Check eligibility. If the carrier says you are not yet eligible, ask what is missing and when you will qualify, such as finishing payments.
- Allow time. Unlock requests can take time, so ask well before you travel.
- Use official channels only. Avoid unofficial unlock services or software, which may cost money, fail, or put your device and data at risk.
- Plan a fallback. If the phone will not be unlocked in time, compare your carrier's roaming plan, a local SIM, or a pocket WiFi. Our guides on eSIM vs physical SIM vs roaming and eSIM vs pocket WiFi help you compare.
A factory reset does not remove a carrier lock, so do not reset the phone hoping to unlock it.
eSIM Readiness Checklist
Before you buy a travel eSIM, confirm each point:
- The phone's lock status is checked and it is unlocked.
- The exact model and regional version supports eSIM.
- The phone shows an option such as Add eSIM or Add Cellular Plan.
- The operating system is up to date.
- You have a stable internet connection to install the profile.
- You know when the plan's validity begins.
You can run the Yatelo compatibility checker for the device side. Once everything is confirmed, browse Yatelo eSIM plans by destination, and read our eSIM data plans guide to choose the right size.
Frequently Asked Questions About Unlocked Phones
Can a phone be unlocked but still not support eSIM?
Yes. Carrier lock and eSIM support are separate. A phone can be unlocked and still lack eSIM hardware, or support eSIM and still be locked to its carrier. You need both before a travel eSIM will work.
Does a SIM PIN prompt mean my phone is locked?
No. A SIM PIN protects the SIM card from use by someone else. A carrier lock restricts which networks the phone accepts. They are different, and the PIN prompt does not tell you anything about carrier lock.
Is a phone bought from a shop automatically unlocked?
Not always. Phones sold on a carrier payment plan or discount are often locked, while phones sold directly by the manufacturer are commonly unlocked. Check the status instead of assuming.
Can I check if my phone is unlocked without a SIM card?
On an iPhone, you can usually read the Carrier Lock field in Settings. On Android, it depends on the brand and software, and Samsung and Google do not document a Settings check. If you cannot find a clear setting, ask your carrier to confirm using the IMEI.
Will a factory reset unlock my phone?
No. A factory reset erases your data but does not remove a carrier lock. Only the carrier that applied the lock can remove it.