Vivo Mobile India — Poor performance

Address:

110096

I purchased vivo model no x5max approx 45 days ago, finding difficult to oprate its very slow and saved contact does not appear many times, it got hanged also several times battery is very poor
Over all its a frustrating phone for me to use
Certain other minor issues, dosent support pdf at times
Many times it gets mute without any reason, it restarts many times also difficult to do confrecing