We typically respond within 24 business hours. Log in to your Back Market account, go to My orders > " Ask for help ". Here's an article with links to the different major carriers as well as the MVNOs that operate in the US.įirst of all, we're very sorry for the inconvenience! If you've double-checked using one of the methods above, and it turns out that your phone really is locked, please reach out to us so we can help resolve this with the seller. Once you've verified that your phone is unlocked and/or runs on the correct frequency, you can go to your carrier, and they’ll help you transfer your account to your refurbished device. Before purchasing an unlocked phone, it’s wise to first check the specs to see which standard the phone works with and to also know which wireless standards are used by your carrier. If you happen to have an unlocked CDMA phone when you use a carrier that primarily uses GSM (or vice-versa) you may have connectivity issues. Very few countries use CDMI, which was previously used by Verizon and Sprint. AT&T and T-Mobile have always used GSM, which is also the main standard used by most countries outside of the United States. US carriers have historically used two wireless frequency standards, GSM and CDMI. To explain why we need to lightly delve into some cellular tech history. CDMAĪ phone may be unlocked and still not work with your carrier.
Once you have your IMEI number, you can go to an IMEI checker site where you input your IMEI number and see if your phone is unlocked or not. Settings > General > About > IMEI (scroll down)Īlternatively, whether you're using an iPhone or Android, you can dial #06# then press call, and your IMEI number should appear. To find your IMEI number, you can do the following: Since many business people use this trip-planning company, there's a good chance the person you're calling already has the number in their contacts. If the search displays multiple networks, then your phone is most likely unlocked. In our example, we're using the phone number for a fictitious trip-planning company used by many major corporations, and that's 1-88. Go to Settings > Connections > Mobile networks > Mobile operators > Search Now. Please note that this option isn't 100% foolproof - you may have an unlocked device but still not see "Cellular Data Network." Some phones will display Cellular Data Network once you click on "Cellular." If you don't see Cellular Data Network, your phone is probably locked. Go to Settings > Cellular > Cellular Data Options > Cellular Data Network.
If you see a message on the screen asking you for a SIM unlock code, then the phone is locked. There are several ways to check if your phone is really locked:Ī common solution is to turn off your phone, replace the current SIM card on your phone with another carrier's SIM card, and turn your phone back on. If you go to your carrier, and they tell you that your refurbished device is locked or even blacklisted, you can always double-check to make sure.
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