Help LTE Issue

[naaniha]

I am using LG G2 D802 from last 10 days. I am using VIVA Bahrain network, which is 4G network. But in my phone I could not get 4G network. I used the same simcard in my Xperia Z1 before 10 days with 4G network. (Android 4.2.2, Software Version: D80210d-AME-XX)

 

[Rukbat]

The LG is missing a few LTE bands that the XPeria has. I don't know which bands VIVA uses, but that could be the difference.