Can't get rid of assisted dialing!

[Drew Jaques]

I bought a unlocked galaxy edge s7 in Japan, and am now in the USA trying to get it to work. Got a SIM from AT&T, and the data works fine, but it won't send or receive any SMS messages or calls. From my research, I've found that the problem is this "assisted dialing" feature, but the normal place where the option to turn this off is, is not there. I assume that this option has been put under this stupid app the Japanese carrier has installed that is listed in the "Call settings" part called "au service" but I can't access it without logging into their network.... Which obviously I cannot do.... So now, I'm hoping to be able to root the device and disable it that way. Anyone know how to find this option and fix it through rooting the phone? I'm running Android 7.0 The model number is SCV33.

 

[B. Diddy]

Welcome to Android Central! What's the exact model number of the phone?

 

[Drew Jaques]

The model number is SCV33.

 

[B. Diddy]

I wonder if part of the issue may be a tenuous connection to the network. The only AT&T 4G band that your phone variant supports is Band 17, and the only 3G band it supports is 850 MHz (AT&T shut down its 2G network a couple of years ago). Is VoLTE turned on? It might be called "HD calling" or "Advanced Calling" in the system settings.

https://www.phonemore.com/samsung-galaxy-s7-edge-scv33/specs/3328
https://www.frequencycheck.com/carriers/at-t-united-states

 

[Drew Jaques]

there is no option for this in the system settings.

 

[B. Diddy]

How about Settings>Mobile Networks>Mobile Data>Enhanced LTE? https://www.androidcentral.com/how-enable-advanced-calling-features-galaxy-s7. The option can be called different things on different devices (or different carriers), and can be found in different places, which is annoying. It's also possible the phone just doesn't support VoLTE.