okay, I’ve mistaken, KDDI do have eCSFB to CDMA since the get go...my brain was stuck in pre-LTE launch era. Sorry.
I’m not sure how “LTE Only” options work on every phones, moving across countries to just make a phone behave certain way is beyond absurd but verifying how it’s working might be a bit of challenge?
regarding roaming, you mean a fake GSM tower with backend going over a VPN to a GSM tower somewhere the phone could roam to? That I didn’t realize. That could happen indeed.
I’m not sure how “LTE Only” options work on every phones, moving across countries to just make a phone behave certain way is beyond absurd but verifying how it’s working might be a bit of challenge?
regarding roaming, you mean a fake GSM tower with backend going over a VPN to a GSM tower somewhere the phone could roam to? That I didn’t realize. That could happen indeed.