I have a toshiba satellite P55-A5312, intel i5 -4200U CPU @1,6Ghz (2,3Ghz), 6gb ram and I want to change my intel wireless-n 7260 to the best I can (dual band). Does anyone knows what would it be ?
You could upgrade to an "AC" card like the 9260 but you will need to find out if the bios supports swapping out components. Some laptop vendors have white lists.