This flash file tested by me without any error working well, you can use this flash file when your device hang on logo problem, restarting problem, security lock problem, password lock problem, pattern lock problem etc software related problem and you can use this tutorial without any box and this is free for all who know about software in mobile, impotent for flashing first must check your micro usb cable if not good then you can't flash it so check micro usb cable second check your device battery that is impotent for flashing if your device battery low so stop your device between flash so this is impotent for flash, before you flash save your data like contact, photos, videos etc because this is factory flash file so you can't save after full flash so must remember all are impotent notes.
1. Download tested flash file or flash tool from above link (if link not working so just write down comment on below comment box)
2. Extract to both files in desktop or as you like path (must installed winrar software in computer or laptop)
4. Click on Scatter/Config File button and choose BESTONE60M_OVERSEA_11B_BB.cfg file from Intex_Nano_S_Plus_V04_Indian_SER folder
11. Wait until installing driver, if driver installed in your computer or laptop then downloading start automatically