Can I downgrade Android Lolipop to an official version of KitKat using Kies?

[Ant2323]

Hello. I have a Samsung Galaxy S5 SM-G901F (Unlocked) and yesterday I updated the OS to Lolipop using Odin.


Since that update I have signal issues (No service most of the time) and I want to downgrade it do KitKat then update it with the official version of Lolipop using Kies. Am I going to be able to do this?

Please answer as descriptive as possible, thats the first Android device I got.

 

[Detectionable]

Not with KIES, you'll need to do the exact same thing you did with ODIN again, except with a KitKat ROM

Check Sammobile for stock ROMs

 

[Ant2323]

The download doesnt even start on Sammobile.

Edit: It started but the download speed is impossible.

 

[Detectionable]

Yup, premium account or slow speeds - I normally get them in about 1 hour from a free account