[via recovery]Increase App storage to 2.7GB On micromax A190 And walton Primo Rx2 By Sadaf Siddiqui

 2.7 app storage for A190 nd Rx2
Note:you will lose files on internal sd card ..And internal Sd card space gets reduced 

LINK  : http://sh.st/nH8wZ

Download zip file
1.Go to recovery flash zip... 
After that
2.wipe
Data
system and
cache
3.Reboot recovery
4.Do Factory reset
After that flash any rom which u like... /restore backup 

Note :- Use cwm or phillz touch...dont use twrp

(Copy your phone to sdcard first for backup your data bcz phone memory will format automatically after this)
Make Recovery rom backup also...

If phone memory didn't show up format internal sd card.....

FULL CREDITS to 

Sadaf Siddiqui