Hi guys, i have a lumia 920 when i charge the phone,it heats up and if i make a phone call during charging, the battery level drains!!! Is this normal???? The battery charging icon blinks but i don't know somehow the battery level goes down. Pls is there any solution for this? Btw, i have a 620 too but i have no problems there. 620's battery increases even if i play games. Why is this? Please do help me.