1. Xm_jdm's Avatar
    My best friend is convinced that he is going to pick up a thunderbolt in a few weeks and get it unlocked to use on AT&T.

    I was wondering if this is possible? Since it has a sim card and all I figure it might be right.
    03-16-2011 10:37 PM
  2. veverkap's Avatar
    I don't believe it has a GSM radio in it.
    03-16-2011 10:41 PM
  3. WhitePhone's Avatar
    100% impossible. Verizon is CDMA radio technology and AT&T is GSM. Two 100% incompatible technologies. The SIM slot is for LTE 4G. Which AT&T doesn't have either, yet.
    03-16-2011 10:46 PM
  4. Xm_jdm's Avatar
    I will let him know so he doesn't waste his money. I thought that might be the case. I did a google search and found a site that claims they sell unlock codes that will make the thunderbolt available to AT&T or tmobile. Must be a scam
    03-16-2011 10:48 PM
  5. bkorver's Avatar
    The SIM slot is for LTE 4G. Which AT&T doesn't have either, yet.
    And even if they did, it's a different frequency... IE... NOT compatible.
    03-16-2011 10:48 PM
  6. brum08's Avatar
    No, it will not be possible. Why would he want to do this anyway? The reason you get the Thunderbolt over other HTC 4.3" phones is because it's on LTE and verizon. There are lots of other HTC and other great phone options on ATT. The Inspire is what he wants: http://www.wireless.att.com/cell-pho...sku=sku5100284
    03-16-2011 10:49 PM
  7. Xm_jdm's Avatar
    I dunno. I have used unlocked iPhones on tmobile and have settled with edge. I have an iPad for data and such but that's just me.
    03-16-2011 10:51 PM
  8. WhitePhone's Avatar
    And even if they did, it's a different frequency... IE... NOT compatible.
    I'm pretty sure AT&T is deploying on 700 MHz like Verizon......
    dalex7777 likes this.
    03-16-2011 10:54 PM
  9. WhitePhone's Avatar
    I will let him know so he doesn't waste his money. I thought that might be the case. I did a google search and found a site that claims they sell unlock codes that will make the thunderbolt available to AT&T or tmobile. Must be a scam
    Yes! Please make sure he doesn't get it. He will be greatly disappointed.
    03-16-2011 10:56 PM
  10. Xm_jdm's Avatar
    I just let him know and directed him to this thread. He was bummed. I know he's been eyeballing this one for a while.
    03-16-2011 10:59 PM
  11. dalex7777's Avatar
    I'm pretty sure AT&T is deploying on 700 MHz like Verizon......
    Reading this thread, @evomaster seems to be the only person who replied who knew specifically what the OP's friend may have been talking about: LTE SIM compatibility between Verizon and AT&T.

    The fact is we don't know if LTE Sim's will be cross carrier compatible. With them both deploying LTE in the 700Mhz frequency,there is a high probability that a device, if it can be radio "unlocked" purchased for one network may work on the 4G of the other. However, without VoLTE being deployed, this would be for data services only, as AT&T and Verizon's 3G and voice services are completely incompatible.

    However, if VoLTE (Voice over LTE) comes into play, this may be a viable option in the future. We'll have to see if VoLTE will be a software/firmware upgrade, or require chipset changes for the big two.
    05-17-2011 05:49 PM
  12. Mortiel's Avatar
    Reading this thread, @evomaster seems to be the only person who replied who knew specifically what the OP's friend may have been talking about: LTE SIM compatibility between Verizon and AT&T.

    The fact is we don't know if LTE Sim's will be cross carrier compatible. With them both deploying LTE in the 700Mhz frequency,there is a high probability that a device, if it can be radio "unlocked" purchased for one network may work on the 4G of the other. However, without VoLTE being deployed, this would be for data services only, as AT&T and Verizon's 3G and voice services are completely incompatible.

    However, if VoLTE (Voice over LTE) comes into play, this may be a viable option in the future. We'll have to see if VoLTE will be a software/firmware upgrade, or require chipset changes for the big two.
    Sadly even with a pure LTE connection, which the Tbolt does not have, LTE SIM encryption will prevent unlocking. Even without a PIN, the SIM is encoded only for Verizon. The phone will lock itself permanently if any other SIM is inserted. This is a hardware feature so its extremely hard to bypass... Impossible for a normal user. This was the main reason that some LTE devices take so long to activate.

    Aside, who would want to waste the Tbolt on AT&T's crappy network?
    05-18-2011 02:56 AM
  13. thrandall's Avatar
    My brother wants to give me his verizon thunderbolt. Can I unlock it and use it on virgin mobile?
    12-07-2012 02:59 PM
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