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If your phone displays the message ‘ This device can be remotely unlocked if eligible. Please use the Device Unlock Application to unlock the device‘ after you insert a non-accepted SIM card, then your handset is locked to Metro PCS or T-mobile USA.T-mobile Device Unlock AppAll the devices which are released after 1st March 2015 (check the list below) can ONLY be unlocked through the T-mobile – there is no designed space where to enter an unlocking code.For these handsets, we do not send unlocking codes, but we register the IMEI as Unlocked in T-Mobile Database and, afterward, you can download the App from Play Store and select Permanent Unlock. Metro PCS Device Unlock AppThe phones locked to released after 1st June 2015 (check the list below) can ONLY be unlocked through the Metro PCS DeviUnlockock App.The unlocking process is different for these devices and we cannot send unlocking codes, but we register the IMEI as Unlocked in Metro PCS Database. Afterward, you can download the Metro PCS Device Unlock App from Play Store and select Permanent Unlock.Note: you don’t need to wait 90 days to unlock your phone as you network provider may ask you. We don’t have this policy. Where to find the Device Unlock App?The Device Unlock App is located in one of the T-Mobile or MetroPCS folders (depending on which network was the device used).
The icon of the app has a Keyhole symbol and the icon background is the color purple (MetroPCS) or magenta (T-Mobile).If you can’t locate the Device Unlock App on your phone, for MetroPCS devices, a factory reset will restore the app to its original location. And T-Mobile users can get the app in.
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The unlock process of a T-Mobile phone through Device Unlock App requires an active T-Mobile USA SIM card.If you do not possess such a SIM card, you can unlock your device by following the steps below:1) Turn on phone without the new SIM card (i.e., no sim card).2) Disable GPS location. Navigate to: Setting-Privacy and Safety-Location-Locating method, select = “Uses Wi-Fi and mobile networks to estimate your location”.3) Disable Wifi Calling. Navigate to: Setting-Application- Phone- Wifi Calling Disable it (turn it off) or select = “Use cellular network for calls. If cellular is unavailable use Wi-Fi”.4) Turn off the phone without a card and turn it back on again. Repeat step 2 and 3 to make sure these setting are off.5) Turn off the phone, and put in new SIM card from a new provider.
Device is not connected to 3G/4G LTE. A non-compatible SIM card is being used, Unable to connect to the server at this time. Please try back again later. Update the app using the Play Store; Attempt the unlock using the mobile network. Unlock Failed: This mobile wireless device is not eligible for unlock.
Now turn on the phone with new SIM card.6) Go to the phone Apps Icon, look for the T-mobile Device Unlock App Icon. Open it, and select Permanent Unlock. When you do this, the phone will try to unlock itself, with the new SIM card in it (i.e., a marriage with the new SIM card). Give it a few minutes and it will be unlocked.Note: Unlock Failed because the phone has already been permanently unlocked as it indicated.7) Restart the phone (Power off and back on).:sunglasses: Now it accepts the new SIM card and the phone will find the new provider.9) Start making calls with your new device.Please let us know how it goes!Kind regards.