Phone is charging without displaying charging icon.
I had my phone working perfectly fine until last night when my battery was nearly 1-2%. It turned off (obviously). But when I reached home and plugged the USB Cable, it only displayed a Gray battery icon with a static ring on it, and that vanished after a few seconds. I gave it sometime (half an hour) to charge. But it still displayed me the same icon.
I used my friend's S4 battery, the phone turned on perfectly. So I was sure that the phone is not dead, but the battery might have died.
I inserted my battery in my friend's S4, plugged the USB cable, and it started charging normally. This confirmed that the battery is perfectly fine. The charging port might be damaged somehow.
But I noticed something very unusual. After getting my battery 30% charged using my friend's S4, I took my battery back and inserted it back into my phone, turned it on, and plugged the charger. It didn't show me the charging icon. This led me to a conclusion that my phone's charging port is damaged. But after half an hour, I looked at my phone, and now it was 60% charged!
The sudden bump on left is my friend's battery being replaced by mine.
So now, I'm charging my phone without the charging icon. But I'm not sure if the hardware has issues or software.
Btw, even my computer doesn't detect any device when I connect it using the cable. Not even an "unrecognized device".