can i change htc desire 816 cdma to gsm outside us

hi every one i bought a new htc desire 816 sprint cdma ,i have unocked the phone to use other carrier networks ,how can i make it convert from cdma to gsm to use it outside us, help neeeded

Dual CDMA sims?

I was curious if anyone had tried dual CDMA carriers on their dual sim G4s. My understanding is that for 3G cdma voice the device itself is registered as opposed to a 3G GSM which registers the sim, so only one CDMA service could be active at a time. Changing to another CDMA carrier would mean going through Verizon's or Sprints's activation process each time you wanted to change to a different sim (this was my experience with a 3 sim adapter). I'd love to hear someone more knowledgeable chime in on this subject and provide some feedback on whether or not this is how it would work with a dual sim moto G4.

I'd love to have dual CDMA sims because I have free service with ringplus (Sprint MVNO) but it's spotty in rural areas, whereas Verizon has the most solid signal in the remotest regions.....however I think it's a pipedream. I am aware that you can do a CDMA LTE sim switch and get data without a problem (I'v done this with a triple sim adapter), it's voice and text that I'm interested in being able to switch to, without having to go through the activation process. And because I need this voice and data in remote areas without LTE, VOLTE isn't an option.

I hope that isn't too convoluted or arcane a question, I realize it's not a common scenario. But with the Moto 4G being carrier friendly to all the north american providers (GSM and CDMA) and having a dual sim slot, it's the first plausible solution to what I'd like to achieve.

HTC EVO 3d PG86100 CDMA Boot LOOP need to FIX

SHOOTER XC SHIP S-OFF RL
HBOOT-1.40.0000
RADIO-0.97.10.0530
eMMC-boot
jun 8 2011,17:20:22


Phone. name: PG86100 CDMA

[CDMA] htc evo 3d 1.40 s-off stuck in bootloop

what i do now i am in trouble

CDMA (LG LS660)mobile conversion to GSM

Hai,
I am having LG LS660 4G unlocked version of boost mobile working on CDMA-850MHz band now due to CDMA carrier shutdown, I am requesting help to convert this model phone to support GSM carriers.