GSM-phones built for the US (and GSM) aren’t compatible with 2G in Japan which is based on CDMA. So I’d like to know can I use VoLTE in Japan when roaming using Tmobile’s roaming agreements with the carriers in Japan? And if so, does that work for txt messaging as well?
If VoLTE is a no go should I be prepared to use VoIP alternatives (I.e. with a different phone number)?
Thanks!
+14
You will need to check the Japanese mobile network your roaming on to see if it's compatible with your phone by entering your imei#.
I've already done that using the kimovil website. For the iPhone 13 mini
- 2G is 0 for 2
- 4G is 10 of 12 depending on carrier.
Otherwise I know the iPhone 13 mini supports VoLTE. But VoLTE depends on the roaming agreements that T-Mobile has in place with the Japanese carriers. I suspect T-Mobile doesn't have such agreements with them. Looking for somebody to confirm.
Thanks!
+14
VoLte depends on if the other carrier supports it. There's phones out there thar have VoLte but it doesn't meet Tmobiles standards.
I know the carriers in Japan support VoLTE. In fact a US competitor to T-mobile announced that their roaming agreements with one of the carriers in Japan included support for VoLTE. I didn’t see a similar announcement by T-mobile which makes me think it doesn’t have a similar agreement with carriers in Japan.
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