-Go to SamMobile website
-Go to Firmwares
-Here type your Model Number & search
-You can select your country or add filters to find the exact Rom for your requirement.
-Click on the result that you want to download.
-Here Make sure to check your Model number and Product Code ( Don’t know about the Product code? No worries bro, they can be found on your Mobile Box).
-Once everything is checked click on Download (you need to login with SamMobile website in order to Download the ROM)
-Your Download Starts.
?STOCK FIRMWARES (LOLLIPOP) From SamMobile
-Extract Stock Rom & Odin that you have download.
-Open Odin as Run as Administrator by giving right click on Odin file.
-Now click VolumeUp+Home Button+Power button at the same time on your Phone. Release the keys once you see the Samsung Logo.
-Here, wipe Factory Data/Reset by using Volume up & Down keys to navigate and Power Key to select.
-Wipe cache Partition also.
-After doing that, select Volume Down+Home Button+Power Key at the same time and release the keys once you see the Warning Message.
-Now Plugin USB cable to your phone.
-Click Volume Up to Continue.
-Now in the PC, Odin’s Id:com will turn blue (if it is not turned blue, it means the drivers are not installed properly. Then try reinstalling samsung kies again).
-Check Auto Reboot and F.Reset Time are marked and Rest of them are unmarked.
-Select AP>Choose extracted file
Quick Tip: if Odin takes lot more time to add the AP file, then move the Odin window. It says Odin not responding but it works and also add the Rom quickly.
– Now Select Start
-Your installation will Start now.
-After installing, your phone Reboots Automatically.