MICROMAX A87 HARD RESET
1.Press & Hold Volume UP + Power On/Off
2.Now Show Android Logo
3.Select Wipe data/factory reset By Volume Up Key
4.After Press Power On/Off Key For Select
5.After Press Volume Up Key For : Yes -- delete all user data
6.After Again Press Power On/Off Key For Select
7.Now Show This
--Wiping Data...
Formatting /data...
Formatting / cache...
Data wipe complete.
8.Finally Select reboot system now & Press On/Off Key