I just purchased a Note 4 on ebay to hold me over until the S8 or iphone 8(will compare the 2 after release). My concern after researching the phone(last note i had was a Note 2) was that a lot of people are having serious issues after the marshmallow release? My question is: is this happening on all Note 4s? Should i try to return the phone before I even receive it? Any advice is appreciated, Thanks.