Samsung Galaxy Pocket Plus (GT-S5301) Firmware Overview
What is the latest GT-S5301 firmware?
S5301XXAMJ1, released October 24, 2013 for region NED with Android 4.0. The archive holds 2 official builds for this region.
Is the Samsung Galaxy Pocket Plus still getting updates?
Most likely not: there has been no new firmware since October 2013, so Android 4.0 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
GT-S5301 firmware for region NED
How to Flash GT-S5301 Firmware
Put the Samsung Galaxy Pocket Plus into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Use HOME_CSC to keep your data, CSC for a full wipe.