I have a Xperia V device which worked fine until few days ago. I still use 3G SIM, and I've enabled WCDMA(preffered)/GSM from settings menu (Settings->More>Mobile Networks->Network Mode). This works perfectly fine until few days ago. I usually get 3G signal, rarely 2G.

One day suddenly I found that phone with no mobile network connection. I thought maybe something wrong with signal coverage. But it didn't changed even after I changed my location. I has few options in Network Mode menu as follows,

  • WCDMA only
  • GSM only
  • WCDMA(preffered)/GSM
  • LTE(preffered)WCDMA//GSM

If I choose anything with WCDMA, phone gets disconnected from the carrier and I can only use the option GSM only whyich gets the connection.

I haven't updated or rooted or did anything to the phone recently.

I tried restarting the phone, toggle flight mode , remove and re-insert the sim card but nothing works.

  1. Why can't I connect to WCDMA/3G?
  2. Why am I only able to connect to 2G network?

This happens in every scenario.not on when turn on mobile data connection. I lost signal when I try to connect to any option other than GSM only

  • Verify that the APN settings (in mobile networks) is correct with the carrier.
    – Bo Lawson
    Jun 4, 2018 at 8:03
  • @Bo Lawson, What the APN settings have to do with signal lost? Or what setting OP need to check ?
    – esQmo_
    Jun 4, 2018 at 8:24
  • @esQmo_ Really just a step in troubleshooting data issues. I was thinking it had to do with the loss of 3g and only being able to access 2g networks. Maybe the carrier changed them and his phone did not get the updated APN.
    – Bo Lawson
    Jun 4, 2018 at 8:27
  • @BoLawson It's not related to mobile data connection, but no mobile network connectivity. How can I fix that?
    – Vishwa
    Jun 4, 2018 at 9:39
  • 1
    Only thing I can suggest is to take backup, factory reset and flash your ROM or the updated version. If that doesn't help, head to service center
    – beeshyams
    Jun 4, 2018 at 10:54


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