Root Please help Tried updating my rooted s3 with smart switch

[CursedBeauty]

I tried updating my unlocked s3 with smart switch (the only program that will work with my cellphone) and my buddy accidentally unplugged the cord from my phone to charge his and it cut off the upgrade. Now I have this message on my screen that say firmware upgrade encountered an issue. Please select recovery mode and try again. So I tried it and nothing came up on the screen and I don't know what to do I tried downloading the update on to my phone again and it woudnt work

 

[Father Guido]

You're going to have to do a lot of research and get cozy with Odin to flash factory firmware. You didn't mention what firmware was on it or the model. There are several variants of this phone (carriers) and many firmware versions of each.

 

[CursedBeauty]

My phones firmware was kit Kat 4.4.2 gwl

You're going to have to do a lot of research and get cozy with Odin to flash factory firmware. You didn't mention what firmware was on it or the model. There are several variants of this phone (carriers) and many firmware versions of each.

 

[Father Guido]

My phones firmware was kit Kat 4.4.2 gwl

Verizon, AT&T, T-mobile? Makes a difference. If I remember correctly, 4.4.2 locked the bootloader, so Odin with the "correct" firmware is your only option. Root is still likely, but a custom recovery isn't.