Disconnect when radio switches from HSPA to LTE on T-Mobile. Xperia ZL C6506
Just noticed that sometimes when the cell radio switches from HSPA to LTE the signal bars go black with a red X for a few seconds before coming back on and showing LTE with a strong signal. Is this normal? This is on my Xperia ZL C6506
yes thats normal since when it switches to LTE it might be unable to find nearest tower with LTE so it goes black with red x untill it reaches one near by then it lights up as normal so nothing to worry about.
