Why doesn't my AT&T sim work properly on my Honor 4x phone?

[AC Question]

At&t sim doesn't work properly on honor 4x phone

I am currently in Boston ,and my huwai honor 4x phone is not working which has at&t sim in it . I doesn't show any signal .

 

[B. Diddy]

Re: At&t sim doesn't work properly on honor 4x phone

Welcome to Android Central! I don't think that phone is compatible with the bands AT&T uses. According to these specs on Amazon, the Honor 4x uses the 1800 and 2100 MHz bands for LTE, and uses WCDMA for 3G (which isn't supported by AT&T's network, which is GSM). The only overlap appears to be the 1900 MHz GSM band (2G).