I have a ZTE Nubia mini NX403a. The device came with non-original ROM which made the device a nightmare. Many pop-ups, malewares, unwanted applications that are been downloaded to the device and in general it is very bad.
In my country the knowledge about this device is very limited so i will have to restore the best ROM by myself however, i never done this type of thing and would LOVE to get some help.
First, can anyone please share with me link where i can take the original or best ROM there is for this device + Gaps?
Second, i would ask a step-by-step instructions of how to do that.
I am technical but never did something like that.. I would really appreciate the help!
Thank you in advance!