Using Sprint LG G3 on Int'l GSM service (PrimeGSM rom) then later on CDMA service?

allanlgz

Senior Member
May 19, 2014
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I will be travelling out of the country for 3 and a half months in May. I am on Fulmics 4.2 currently, Ringplus.
I planned to flash PrimeGSM to gain GSM service and pop in a sim while there to use, then flashing back to Fulmics 4.2 backup (or Stock Sprint ROM if there are any issues) when returning to the US.
Would using a ROM to gain GSM service (my sprint g3 is not international sim unlocked AFAIK) and then returning to CDMA service cause issues with the phone? I know that flashing a ROM doesn't change or alter your phone's activation status, just want to know if doing this will cause any irreversible changes to the phone, never done this before. Will test it when getting there to see if it actually is international sim unlocked by the previous owner (Bought it used) or not., if not will flash PrimeGSM rom for ls990.
Thanks!
 
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