1. Windows Central Question's Avatar
    Hello guys,

    I'm having some problems with my 640. I can't make calls or start WhatsApp and when someone calls me, they receive the message that my phone is off. I've already made a Hard and soft reset.

    Hope someone can help :)
    11-21-2016 12:45 PM
  2. ven07's Avatar
    Every time that i reset the phone, it Works for a few minutes, and i've already made a hardreset :(
    Ok well we have that out of the way. The other option would be to go full nuke on the phone and use the windows device recovery tool.Since you have a 640 you shouldn't have any issues with the program not recognizing your phone.However keep in mind, that if you're currently on windows 10 and you decide to use the recovery tool, it will downgrade you to whatever OS version the phone shipped with (whatever it had when you first booted it up).Have you considered trying with a different Sim? doubt it, but worth a shot
  3. libra89's Avatar
    Hmm, I believe the problem might be with your sim. Can you try getting a new sim from your carrier?
    ven07 likes this.
    11-21-2016 01:49 PM
  4. ven07's Avatar
    I'm not sure if the problem is with the sim, every time that i restart the phone it Works for a few minutes.
    Hi Julian, have you tried soft/ hard resets?
    11-21-2016 04:11 PM
  5. Julian Cristian's Avatar
    Every time that i reset the phone, it Works for a few minutes, and i've already made a hardreset :(
    11-21-2016 04:12 PM
  6. ven07's Avatar
    Every time that i reset the phone, it Works for a few minutes, and i've already made a hardreset :(
    Ok well we have that out of the way. The other option would be to go full nuke on the phone and use the windows device recovery tool.Since you have a 640 you shouldn't have any issues with the program not recognizing your phone.However keep in mind, that if you're currently on windows 10 and you decide to use the recovery tool, it will downgrade you to whatever OS version the phone shipped with (whatever it had when you first booted it up).Have you considered trying with a different Sim? doubt it, but worth a shot
    libra89 likes this.
    11-21-2016 07:50 PM
  7. Julian Cristian's Avatar
    I've really think it's a software problem so i'll try to use the recovery tool.

    Thanks a lot!
    11-22-2016 10:46 AM

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