kapiljhajhria
Broken In
Most of the smartphone behave that way. My galaxy s3, my sister's grand duos and my mom's galaxy s duos. All when plugged into unreliable power sources, their screen becomes unresponsive or phone starts registering touches by itself. All over the screen. Normally this happens after phone reaches 100% and u still use unreliable power source. But sometimes power source is so unstable that it happens as soon as you plug it in.I think the phone touchscreen behaves weird when you plug it in, depending on the power source; it's fine when I'm using from my home, but yesterday while traveling I plugged into the outlet in train and tried to use it, screen wasn't even responding, funny thing is I plugged in my friends phone, a Lenovo one! And his too didn't respond! (phone was fine when you disconnected it)
Other reasons are bad battery, bad charger, power source (u already know), bad charging port basically anything that is power related.