Samsung Galaxy Tab 3 10.1 (3G+WiFi) (GT-P5200) Firmware Overview
What is the latest GT-P5200 firmware?
P5200XXUBOB1, released May 26, 2015 for region PRT with Android 4.4.2. The archive holds 2 official builds for this region.
Is the Samsung Galaxy Tab 3 10.1 (3G+WiFi) still getting updates?
Most likely not: there has been no new firmware since May 2015, so Android 4.4.2 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
GT-P5200 firmware for region PRT
How to Flash GT-P5200 Firmware
Put the Samsung Galaxy Tab 3 10.1 (3G+WiFi) 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.