Message Apne aap send hota rahta haiLekin sent mai show nahi hota hai .Koi problem to nahi hai ?

After Latest software upadate, my phone Automatically switched off when it is not in use Anyone know how to uninstall latest software update or any other idea

I used jio since 3 years ago but sometime ago jio network is not stable in my j7 prime so I ho to jio center but sim is ok because I use it in my mi note 5 so jio person advised me to update my phone so I want to know that how I solve this problem

My phone switch off when battery is 50%Why ?Please help me The service centre is waste 

J7 prime battery ka price 856 rs hai aur service center par 1850 rs ki dal rahe hai