Troubleshooting the ‘Device Unlock’ Android App

Device Unlock application runs on the Android platform and allows a user to request for an unlock code directly from the mobile phone or tablet. It allows a user to apply a Mobile Device Unlock without the use of a manual password. In simple terms, once your device is locked using the ‘’Mobile Device Unlock’’ there is no need to request for an unlock password.

Only devices supported by the app can download it from the Google Play site.

It should be noted that it’s critical for you to order the correct unlock code from a reputable service provider.

Supported Models from T-Mobile USA Supported Models from MetroPCS USA
  • Alcatel OneTouch POP Astro (OT-5042T),
  • Alcatel OneTouch Evolve (OT-5024N),
  • Coolpad Rogue (3320A),
  • HTC One M9,
  • HTC Desire 626s,
  • Kyocera Hydro LIFE (C6530),
  • Kyocera Hydro Wave (C6740),
  • LG G Stylo (H631),
  • LG G4 (H811),
  • LG Leon LTE (H345),
  • LG V10 (H901),
  • Samsung Galaxy Avant (SM-G386T),
  • Samsung Galaxy S6 (SM-G920T),
  • Samsung Galaxy S6 Edge (SM-G925T),
  • Samsung Galaxy S6 Edge+ (SM-G928T),
  • Samsung Galaxy S7 (SM-G930T),
  • Samsung Galaxy S7 Edge (SM-G935T),
  • Samsung Galaxy Note 5 (SM-N920T),
  • Samsung Galaxy Grand Prime (SM-G530T),
  • Samsung Galaxy Core Prime (SM-G360T),
  • Sony Xperia Z3 (D6616),
  • ZTE Avid Plus (Z828),
  • ZTE Obsidian (Z820),
  • ZTE Zinger (Z667T).
  • Alcatel One Touch Fierce XL (OT-5054N),
  • HTC Desire 626s,
  • Kyocera Hydro ELITE (C6740 & C6740N),
  • LG Leon 4G LTE (MS345),
  • LG G Stylo (MS631),
  • LG K7 (MS330),
  • Samsung Galaxy Core Prime (SM-G360T1),
  • Samsung Galaxy Grand Prime (SM-G530T1),
  • ZTE Avid PLUS,
  • ZTE Obsidian (Z820).

How to use the ‘Mobile Device Unlock’ app

  1. Navigate in your application list and open the Device Unlock app
  2. Click on the Continue button
  3. Click the desired unlock you want, in this case, choose Permanent Unlock
  4. If step three succeeds, reboot the mobile device

Note: You need to restart the device so that the settings you changed can be applied, otherwise you will keep on getting notifications on the same.

How to troubleshoot the ‘Mobile Device Unlock’ app?

  1. Go the device setting and ensure your data settings are on
  2. Ensure the application cache is cleared
  3. Check your device’s memory to see if it’s at manageable levels
  4. Reboot your mobile device and start the process afresh

If you still receive an error even after following the steps named above, do the following

Error Message Information / Troubleshooting
Device not recognized by your service provider. Please call customer care.
  • Rooting your device will disable the unlock application
  • Download the latest T-Mobile software to continue
Data corrupted during transfer. Please try again.Error during data transfer. Please try again.
  • Ensure the device has stable mobile signal
  • Restart the device and try again
Server not responding. Please try again later.
  • No response is received from the server
  • Try using an alternate internet connection
Failure in processing the request. Please reboot device and try again.
  • Ensure that your device has sufficient memory
  • Restart the device and try again
No internet connection available. Please try again when internet connection is available.
  • No internet connection is available:
  • 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. For Device Unlock eligibility details, please go online or contact Customer Care.
Unlock Failed : System maintenance error, try again later.
  • System Maintenance is currently underway
  • Wait and try again later
Failure in applying the unlock settings. Please try again.
  • The device must be connected to the mobile network (including domestic and international roaming)
  • Disconnect from Wi-Fi and try again.

 

  1. Ensure the firmware installed on your device is the original stock ROM that comes with the phone or tablet and not a custom firmware such as an Unbranded ROM or CynogenMod
  2. Are you using the latest updated firmware on your device?
  3. If you weren’t using the latest firmware and you decided to upgrade, make sure you Hard Reset you tablet or mobile phone
  4. Avoid using 3G or LTE and instead, use a local Wi-Fi for internet
  5. Use home Wi-Fi because your work Wi-Fi or public Wi-Fi may limit the amount of data you consume
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