1. tech_fan's Avatar
    If I purchase a T Mobile S10 and then move to Verizon will there be any issues with the phone accessing the Verizon network? I understand that T Mobile might lock it for 40 days but besides that?

    I want to keep my options open in case I move back to Verizon in the future and don't want to purchase another phone when I get to Verizon.

    Thanks.
    05-24-2019 03:32 PM
  2. mach1man's Avatar
    I'm pretty sure that verizon is CMDA and T-mobile is GSM so that will not work. I know Verizon phones are capable of being unlocked to use on most networks. Also if you purchase on T-mobile and move to Verizon then you will have to pay the phone off to use it on Verizon IF it's even capable of being on that network, otherwise t-mobile will black list the device for non-payment
    kct1975 likes this.
    05-24-2019 04:01 PM
  3. tech_fan's Avatar
    I'm pretty sure that verizon is CMDA and T-mobile is GSM so that will not work. I know Verizon phones are capable of being unlocked to use on most networks. Also if you purchase on T-mobile and move to Verizon then you will have to pay the phone off to use it on Verizon IF it's even capable of being on that network, otherwise t-mobile will black list the device for non-payment
    The paying off part I am not worried about I plan on paying it in full. I have an XS Max that I paid off before I went to T Mobile so, i am using that on the T Mobile network and I am in an iffy area. So their tech support suggests that I try a T Mobile phone. I don't want to buy another phone and then find out it doesn't solve my issue and then go back to Verizon only to figure out that I will need to buy another phone from Verizon to work on their network.
    05-24-2019 04:24 PM
  4. mach1man's Avatar
    The paying off part I am not worried about I plan on paying it in full. I have an XS Max that I paid off before I went to T Mobile so, i am using that on the T Mobile network and I am in an iffy area. So their tech support suggests that I try a T Mobile phone. I don't want to buy another phone and then find out it doesn't solve my issue and then go back to Verizon only to figure out that I will need to buy another phone from Verizon to work on their network.
    Ok so yeah if you're paying out right then buy unlocked from samsung, then it will have all of the bands needed.
    kct1975 likes this.
    05-24-2019 04:34 PM
  5. cert15z's Avatar
    I had a T-Mobile Galaxy s9 plus that I paid off and had T-Mobile unlock. I put a Verizon SIM card in it and it downloaded all Verizon apps and even Verizon splash screen on startup.
    05-24-2019 04:51 PM
  6. burrzoo's Avatar
    Verizon is totally getting rid of CDMA by the end of the year. Mostly GSM now.


    Even when I sold my unlocked AT&T Galaxy S8+ a couple of years ago, it worked on Verizon. Friend still using it too.

    http://www.verizonwireless.com/suppo...e-base-218813/
    05-24-2019 04:57 PM
  7. kct1975's Avatar
    Verizon is totally getting rid of CDMA by the end of the year. Mostly GSM now.


    Even when I sold my unlocked AT&T Galaxy S8+ a couple of years ago, it worked on Verizon. Friend still using it too.

    http://www.verizonwireless.com/suppo...e-base-218813/
    Just a slight correction...to the best of my knowledge...Verizon is shutting down the CDMA network, but they are not switching over to GSM, they are switching to LTE Only if and eventually combination of LTE and 5G.
    05-24-2019 05:06 PM
  8. burrzoo's Avatar
    Just a slight correction...to the best of my knowledge...Verizon is shutting down the CDMA network, but they are not switching over to GSM, they are switching to LTE Only if and eventually combination of LTE and 5G.
    I'm not 100% sure but I thought LTE was for *data* only and GSM is the voice part. So I think that Verizon still has GSM. Thanks for your comment. Now time to Google it.
    @kct1975,
    A little confusing but essentially, I think you are correct.
    Here's an article explaining:
    https://www.pcmag.com/news/300986/cd...the-difference
    05-24-2019 05:17 PM
  9. Almeuit's Avatar
    I'm pretty sure that verizon is CMDA and T-mobile is GSM so that will not work. I know Verizon phones are capable of being unlocked to use on most networks. Also if you purchase on T-mobile and move to Verizon then you will have to pay the phone off to use it on Verizon IF it's even capable of being on that network, otherwise t-mobile will black list the device for non-payment
    This is only if running on the older network. When on LTE it will work fine.
    05-24-2019 05:43 PM
  10. Almeuit's Avatar
    I'm not 100% sure but I thought LTE was for *data* only and GSM is the voice part. So I think that Verizon still has GSM. Thanks for your comment. Now time to Google it.
    @kct1975,
    A little confusing but essentially, I think you are correct.
    Here's an article explaining:
    https://www.pcmag.com/news/300986/cd...the-difference
    No Verizon operates VoLTE (Voice-Over-LTE) -- so everything is data. Same with T-Mobile / AT&T who operate VoLTE. GSM/CDMA only matters if you drop down to a 3G area.
    burrzoo likes this.
    05-24-2019 05:43 PM
  11. kct1975's Avatar
    No Verizon operates VoLTE (Voice-Over-LTE) -- so everything is data. Same with T-Mobile / AT&T who operate VoLTE. GSM/CDMA only matters if you drop down to a 3G area.
    And at least for now CDMA and GSM are still used for Voice Calls.

    At the moment these are the Technologies used by the Major Carriers (in alphabetical order of Carrier) ...

    AT&T: 4G LTE Data with GSM Voice and 3G GSM when needed

    Sprint: 4G LTE Data with CDMA Voice and 3G CDMA Data when needed

    T-Mobile: 4G LTE Data with GSM Voice and 3G GSM Data when needed

    Verizon: 4G LTE Data with CDMA Voice and 3G CDMA Data when needed

    Going forward...all Carriers will be dropping 3G and will be going with 5G Data and 4G LTE VoLTE for Call with 4G LTE as a backup to 5G when needed

    Right now I don't have time to provide the proper references for my information above, but if you Google it, you can easily find the information.
    05-28-2019 09:39 PM
  12. JHBThree's Avatar
    And at least for now CDMA and GSM are still used for Voice Calls.

    At the moment these are the Technologies used by the Major Carriers (in alphabetical order of Carrier) ...

    AT&T: 4G LTE Data with GSM Voice and 3G GSM when needed

    Sprint: 4G LTE Data with CDMA Voice and 3G CDMA Data when needed

    T-Mobile: 4G LTE Data with GSM Voice and 3G GSM Data when needed

    Verizon: 4G LTE Data with CDMA Voice and 3G CDMA Data when needed

    Going forward...all Carriers will be dropping 3G and will be going with 5G Data and 4G LTE VoLTE for Call with 4G LTE as a backup to 5G when needed

    Rugh now I don't have time to provide the proper references for my information above, but if you Google it, you can easily find the information.
    At&t's GSM network was shut down fully in 2017.
    05-28-2019 09:59 PM
  13. Almeuit's Avatar
    And at least for now CDMA and GSM are still used for Voice Calls.

    At the moment these are the Technologies used by the Major Carriers (in alphabetical order of Carrier) ...

    AT&T: 4G LTE Data with GSM Voice and 3G GSM when needed

    Sprint: 4G LTE Data with CDMA Voice and 3G CDMA Data when needed

    T-Mobile: 4G LTE Data with GSM Voice and 3G GSM Data when needed

    Verizon: 4G LTE Data with CDMA Voice and 3G CDMA Data when needed

    Going forward...all Carriers will be dropping 3G and will be going with 5G Data and 4G LTE VoLTE for Call with 4G LTE as a backup to 5G when needed

    Rugh now I don't have time to provide the proper references for my information above, but if you Google it, you can easily find the information.
    Incorrect. When you are using VoLTE it is using LTE for voice & data. That is literally why it is called Voice-OVER-LTE. Key word: over. As I stated CDMA/GSM only matters if you are in a 3G area to begin with. When you are in LTE it uses ... LTE.

    T-Mobile/AT&T: VoLTE and can FALL BACK to HSPA (GSM) if you leave LTE while on a clal.

    Verizon/Sprint: VoLTE and CANNOT fall back to CDMA while on a call so the call will drop and you will have to re-initiate the call on 3G.
    While I appreciate you trying to school me with Google I do know what I am talking about and follow this religiously so please do better research before trying to prove me wrong on something that I am not wrong about. Usually if I don't know I would say so.
    chevyman29 likes this.
    05-28-2019 10:20 PM
  14. Almeuit's Avatar
    At&t's GSM network was shut down fully in 2017.
    He is trying to refer to their HSPA as GSM. I get what he was saying but his quick Google search was incorrect with old information saying they still use the old standards for calls but they don't hence VoLTE (voice-over-LTE). The legacy 3G/HSPA/GSM/CDMA (insert whatever here) networks are only used if not in a LTE area until they get shut down which in Verizons case will be the end of this year.
    05-28-2019 10:26 PM
  15. JHBThree's Avatar
    He is trying to refer to their HSPA as GSM. I get what he was saying but his quick Google search was incorrect with old information saying they still use the old standards for calls but they don't hence VoLTE (voice-over-LTE). The legacy 3G/HSPA/GSM/CDMA (insert whatever here) networks are only used if not in a LTE area until they get shut down which in Verizons case will be the end of this year.
    Yup.
    05-29-2019 10:54 AM
  16. frederickdawg's Avatar
    If I purchase a T Mobile S10 and then move to Verizon will there be any issues with the phone accessing the Verizon network? I understand that T Mobile might lock it for 40 days but besides that?

    I want to keep my options open in case I move back to Verizon in the future and don't want to purchase another phone when I get to Verizon.

    Thanks.
    Worst case scenario, you just flash over the Verizon firmware on to it. But the devices must be USA, U or U1 models.

    I don't think the current firmware level has self rebranding function on it. Meaning when you swap sims the firmware changes to the sim carriers. But that will come in the future like it did with previous Samsung devices.
    05-30-2019 09:28 AM
  17. kct1975's Avatar
    He is trying to refer to their HSPA as GSM. I get what he was saying but his quick Google search was incorrect with old information saying they still use the old standards for calls but they don't hence VoLTE (voice-over-LTE). The legacy 3G/HSPA/GSM/CDMA (insert whatever here) networks are only used if not in a LTE area until they get shut down which in Verizons case will be the end of this year.
    My apologies to everyone if my previous post came across as snotty. That was not my intention.

    My original point I that was trying to make was that Verizon was a CDMA Carrier and never used GSM.

    I am aware that almost all of the Carriers currently transitioning are to VoLTE. I was not aware that VoLTE had become the primary mode of voice communication for AT&T and Verizon and T-Mobile.

    Personally I am currently with Sprint and all of my calls are either CDMA or WiFi Calling. To the best of my knowledge, Sprint hasn't deployed any VoLTE as of yet. So Sprint is at least one carrier that still uses CDMA.

    Again, my apologies if I came across as snotty, but I was just attempting to clear up some confusion.
    mustang7757 likes this.
    06-06-2019 05:03 PM

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