IBAD Mobile Number & Contact Details

I bought this mobile phone a week ago. It is a fat set. Build quality is not good. Keypad is hard. But its speaker is loud. It records calls in very clear voice. Its battery does not appear to be 5000 mah as they claim to be because when I used it as power bank to charge my 640 xl dual sim. It exhausted speedily more than half increasing only 10 % charge to 640 xl which is about 300 mah only. I think its battery is not more than 2000 mah or even less than that. They wrongly claim it to be 5000 mah. Good for only calling and listening to music. Calling and music sound is clear.