Micromax — Micromax unit 2/more bad conditions of phone after giving at care

Address:

Mahendragarh, Haryana

Sir I gave my phone at care centre narnaul on 17Dec2015 due to charging problem.it was came at care on today after correction but its back cover has been changed from gray to white colour which is unsuitable to my phone I talk to care person but they told that it was changed from care centre and it was also have problem in on/off switch after that. So how I can correct my phone in short time .