I've had Lenovo Vibe (P1ma40) for more than 2 years, the screen is bit cracked but otherwise it's in a good condition. Yesterday it suddenly started lagging - basically it lags every few seconds and after a second or two starts working again. At the same time most of the apps using internet (like Youtube, Gmail and even Google Play) stopped working. I can open them but they just get stuck on the loading screen. Some other apps like Messenger or spotify work fine tho (but they still lag). I've done all the usual sh*t like restarting phone and wifi, checking if the system is up to date (it is) and cleared cache of all the apps. nothing helped, so I'm getting a bit desperate. Thanks for the help.