Can my Huawei P20 Pro be upgraded to LTE?
I'm using my Huawei P20 Pro with Straight Talk (AT&T towers). The phone has dual SIM slots, only one is in use. It appears the phone may be LTE capable, but is not currently compatible. Is it possible to put a second SIM card in the phone that will make it LTE compatible? This phone is only 2 years old and I paid a lot of money for it. I really don't want to buy a new phone. Can someone help?