Will this phone work with AT&T also will it work out of the box to get calls and notifications. The last time I bought a phone from you guys Xiaomi 12 Ultra for Chinese version, I had to spend a lot of time getting it working. Sometimes my text was delayed also. Reply: Yes, it can work on AT&T, maybe you can,t set the global version for the xiaomi phone in time. but I haven't heard any problems on this phone. it is xiaomi flagship phone....