Sony Experia M4 Aqua is not a good mobile. Specially its battery charging. Its software is malfunctioning and shows 100% full battery charged within 5 minutes and it goes for power off later. Its very erratic. I cant trust by just looking at the battery symbol in the mobile.
I have purchased a Laptop from above place, It was a defective piece, I have taken to Sony service center for repair, kept there for 3 months, contacted SONY India by email and over phone in these 3 months, no response. Absolutely 3rd graded support. I can not Trust SONY any more. I still have that defective piece with me.
DO NOT BUY ANY PRODUCT OF SONY, CHECK PEOPLE REVIEW ON THEIR FACEBOOK PROFILE
The Sony mobiles / smartphones has a very high rate of manufacturing defects. It being sold through various franchises and the OEM showrooms and it shows up issues within a month - dead mobile, quick over-heating, very low audio output, the software hang-up etc. One can do google search for Sony Mobile complaints and thousands of complaints will be listed.
Instead of replacing the faulty set, the OEM has the policy of repairing/re-conditioning the set. Hence, purchase of Sony sets (China Production) may be avoided.