Help The firmware help ?

[Aofthel]

Hello , im new here and i have read a lot on this forum, but i couldnt find the solution to my kinda specific questions. I was on modaco but couldnt find answer there too. So here these are my questions and explanations , if u can please help.
I had stock + rom ics from modako but it was kinda slow so i switched to atomic mod and its kinda faster.
I got xynih memory, and i want to switch to official telekom huawei firmware so i can update it to official jelly bean becouse i think it wont brick my phone, if it will please tell me i got cwm 5.2.0.8 (i think) and rooted.
So please tell me how to get it back and im not shure if this atomic mod im on locked my boot loader please tell me.
THANKYOU !!!!!!!

 

[eugenerudenko]

and i want to switch to official telekom huawei firmware so i can update it to official jelly bean becouse i think it wont brick my phone

There's no official jelly bean for huawei g300

 

[Aofthel]

There's no official jelly bean for huawei g300

I know i saw it somewhere on huwaei it was like 700mbd , but nvm how to i go back to official ? like this 1
Downloads - Huawei Device Co., Ltd..

 

[eugenerudenko]

Create a backup of all your important data and make factory reset.