This is the topic on how we can increase the internal storage of our phone which is actually 503 MB only but as we all know that our phone storage is around almost 2GB user available.. which is kind of waste for the people with mem card.. so there is a tool available online which does the partition of internal memory.. and hence we can convert phone storage into internal storage... I have tested this on micromax a89 only and it works like charm can be used for other mediatek phones..anyways so what you need is a rooted phone off course and any custom recovery installed on your phone.. backup using custom recovery before trying...otherwise you will loose all data.. I was using TWRP so I will write according to options in that recovery.. after backing up using recovery reboot and install the tool link given below... grant super user permissions... and a simple menu will come up showing the mem sizes choose any size below 2GB I chose 1GB and kept rest 1GB for phone.. u can choose whatever pleases u.(choosing 500MB will be waste as we already have that much internal space). After that reboot in recovery and wipe data/factory reset remember this is important otherwise your phone will end in boot loop..
In TWRP first wipe internal storage then do factory reset..after resetting using recovery.. and you will see your increased phone storage...
REMEMBER:You can restore your backup using recovery but be sure that backup of phone storage will be smaller than ur new phone storage... and restoring won't affect your new partition size..
If you find this useful hit Thanks