1. AC Question's Avatar
    Hi There,

    I have a verizon galaxy S4 and I have moved over to Ting. I have a problem whenever my data connection is on 4G LTE, Everything works fine but I cannot send or receive text messages. If I have "H" or "H+", it works absolutely fine. I am assuming this is because H and H+ use GSM and when it is on LTE it isn't using GSM. I was wondering if I could disable LTE so my phone will on operate on H or H+. Thanks in advance for your assistance.
    06-04-2016 04:49 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! Are you using Ting's GSM or CDMA network?
    06-04-2016 06:27 PM
  3. jerguy1928's Avatar
    I am not sure specifically. I just bought a Ting SIM and configured the APN. Is there a special CDMA SIM one can buy vs GSM?
    06-04-2016 08:12 PM
  4. B. Diddy's Avatar
    Not sure. I can't find a definitive answer in Ting's support site, either. APNs are usually used for GSM networks, so I would guess you're using their GSM network.

    But it's still a bit confusing to me. Ting's GSM network uses Band 4 AWS (1700/2100 MHz) for 3G (which includes HSPA and HSPA+): https://help.ting.com/hc/en-us/artic...G-and-LTE-Data. But your phone doesn't support that band--it supports 850, 900, 1900, and 2100 MHz for 3G (the 2100 MHz band is different from the 1700/2100 MHz band that the phone supports): Samsung Galaxy S4 (Verizon), Black. So I'm not sure how your phone could be on 3G.

    In any case, go to Settings>More Networks>Preferred Network Type (the name of the menu option might vary), and see if you can force it to stick with 3G there.
    06-05-2016 12:43 AM
  5. jerguy1928's Avatar
    So I had bought a GSM SIM, and NOT. a CDMA one. Would it help if I bought a CDMA SIM from Ting? Unfortunately I didn't find any option to force 3g.
    06-05-2016 12:04 PM
  6. B. Diddy's Avatar
    According to Ting, Verizon devices are supposed to work on the GSM network, assuming they have the right band support: https://help.ting.com/hc/en-us/artic...ed-Devices-FAQ. I read elsewhere that Sprint devices are the ones that work best on their CDMA network.

    I'm still scratching my head about this. Can you make sure your APN settings are correct? https://help.ting.com/hc/en-us/artic...d-APN-Settings. (Although APN shouldn't affect simple SMS messages ...)
    06-05-2016 12:59 PM
  7. jerguy1928's Avatar
    Hi There,

    Sorry for such the long wait for reply. I checked all the APN settings and they are correct. Any further ideas? Would a CDMA SIM card help?
    06-14-2016 10:48 PM

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