LM-G820UM - Unable to make calls since last month.
I have been using ATT for nearly the last five years. Suddenly, I couldn't make or receive any calls on my mobile since the previous month (March). Text and data are working fine.
My mobile model is LM-G820UM (Unlocked mobile, and I see the Sprint logo on the start). On googling, the issue is related to the phasing out of the 3G network by ATT.
I have liked ATT service so far, would like to retain my number, and enjoyed my phone as well.
I would like to know my options here.
1. Is there a workaround for making and receiving calls on my existing LG mobile?
2. If there is no workaround, I would like to know can I port the number to another mobile carrier (say, T-Mobile) and retain the number and phone?