I am looking for a non Chinese brand below 10000 India rupees with near or above 4000 mah battery, so I would like to buy this phoneIf any have been using this phone then could you please let me know if you are facing problem with this phone in any of the following segments? 1) Call drop2) Low call volume3) Person at other end unable to hear properly4) Internet problem via sim or wifi5) GPS fails to lock or too slow to lock location while standing still or travelling in vehicle etc6) Over heating while charging or using phone7) Any other problems like phone becoming unresponsive or restarting etc8) Any other problem you noticedCould you please give a review of battery life like this much hours of browsing etc.