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Thread: How to fix error “Unable to connect to the server” on T-mobile Device Unlock app

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    Thumbs up How to fix error “Unable to connect to the server” on T-mobile Device Unlock app

    "Unable to connect to the server" error FIX


    Device Unlock App will unlock your device in certain conditions, you can check if your phone is eligible by checking the T-Mobile Device compatibility page or just by trying it and pressing the Permanent Unlock button from the Device unlock app. If you trying it and you get a message like "Unlock Failed": This mobile wireless device is not eligible for unlocking. For Device Unlock eligibility details, please go online or contact Customer Care, basically means the phone is not eligible for a free unlock from T-Mobile.


    In this case, you do not need to panic is still a way to get it done, you can get a T-Mobile Device Unlock service from onlineunlocks.com and you will have your phone unlocked in a few days max.

    Device unlock app in some cases can return with different types of errors. One of those errors can be "Unable to connect to the server. Please try again later".We can help you fix this error with some simple steps.
    This error is not related to the unlocking process, but to the Device Unlock App.

    Okay, let's start and eliminate what may be the cause of the problem:


    • Normally this is a problem caused because there is a connectivity problem between your phone and the Tmobile server and the server is not able to receive the phone details. The internet connection might be very slow, that is why the T-mobile recommends using a good wifi connection when performing the request The solution would be to change the connection to a faster and more stable connection, restart the phone and try again
      Also, there might be a firewall on the phone or on the rooter of the wifi you are connected to that might stop the connection to server
      Verify if you have any antivirus program installed on your device and stop it for a bit, and if not check on your router if you have access or if not just use other internet connection


    • Might be a problem with the Device Unlock app
      To fix this first of all clear the application cache. From the Home screen, tap Settings > Apps. Select the Device Unlock app and if available select Clear Cache. Can also try and clear all cache by booting into recovery mode (turn off then hold home(or bixby) power and volume Up) then select “Wipe cache partition”


    • Might be a problem with T-Mobile server.Even if this is less possible, I know cases when has happened, so just wait for a few hours, do a restart and maybe even change the wifi connection and try again.


    • The most effective way of solving this error is with a factory reset. You can do a factory reset from System settings > Backup & reset. As a last resort can go ahead and restore full firmware either using the program Odin or Samsung Kies. Specially if your phone is rooted for sure this is the only solution .This last part might be a more complex process so if you decide to do this look carefully into it or ask help from a professional, can contact us on the chat our website OnlineUnlocks.com.
    Last edited by onlineunlocks.; 07-29-2018 at 03:59 AM.

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