Japanese carrier: EM Mobile S21HT

[musato]

I'm wondering if I can use CDMA roms on this site with a Japanese phone? Hoping to flash a WWE version as my Japanese is less than perfect. I know that EM Mobile(sometimes e mobile) uses a 1700MHz band different than the one in the states, its WCDMA and HSDPA.

Asking because I see lots of Sprint/Telus specific ROMS, I'm not sure if thats just software or ESIM/etc related??

If it matters I don't need to switch providers, I just want to use this phone, on my current plan, with an English OS.

Cheers and thanks,

Alexander