Ever since my Galaxy S7 StraightTalk Tracfone did its update and I got Android Nougat 7.0, Ive had nothing but problems. Samsung tells me that I need a software reflash but they arent authorized to work on a straight talk tracphone and there is no authorized dealer in my area who can do it. So I'm hoping someone in here can help me downgrade back to Marshmallow. Please I need step by step instructions for beginners. Thank You In Advance