Greetz...a link to the stock firmware for the ZTE Max XL, Model # N9560, Code Name: Bolton, Firmware: NMF26F Android Nougat 7.1.1 :
https://mega.nz/#!Yg0wAYLJ!wYBDYoBUqb_U3tmhhW0G9wBCa_pb5AjcdxXUD1x7uhY
./SOk
https://mega.nz/#!Yg0wAYLJ!wYBDYoBUqb_U3tmhhW0G9wBCa_pb5AjcdxXUD1x7uhY
./SOk