Uk software updates and screen flicker on one x

[DUBNBASS]

Had the phone over a year and half now and it is unbearable the screen flickers all the time and often have to hard boot the phone to even see the screen then i have to excercise it with on and off and also volume to get the screen to be useable,

Also since I upgraded the software my wifi doesn't hardly connect and my notifications no longer show up its gonna make me throw the thing out the window soon if it continues

Please help