1. Windows Central Question's Avatar
    I'm trying to get 3G data enabled in my Lumia 640xl. I'm currently using just one SIM out of the two available. The area has 3G coverage as another mobile (Oneplus) with the same SIM detects a 3G network. Is there any APP that I need to download for enabling the 3G modem?
    05-15-2015 01:38 AM
  2. gpobernardo's Avatar
    Have you tried checking the cellular connectivity specifications of the Lumia 640XL and compare the band frequencies compatible with your phone with the band frequency/ies available with your mobile service provider?
    RumoredNow likes this.
    05-16-2015 05:02 PM
  3. RumoredNow's Avatar
    Use a dual SIM phone | Windows Phone How-to (United States)

    At any time there is only one SIM in it should probably be in slot 1. Is data switched on for that slot? See the above link.
    gpobernardo likes this.
    05-16-2015 08:34 PM

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