How can i upgrade my android version?

[AC Question]

I have a Huawei G630-U20
OS version 4.3

I want to upgrade it to at least 4.4, mainly so i can play Pokémon Go.

I was looking around the internet, but I still wanted to ask here just to be safe that i don't mess up and brick my device somehow.

Any advice will be helpful, since i'm not much of a tech savvy

 

[anon(632115)]

4.3 was the last official version. I was unable to find any custom ROMs for that device.

 

[KosukeN]

I just made an account.

I also forgot to mention that my device is rooted.