thanx for your reply i have tested all those frimware and none of them working properly for wireless. i think if you give me the factory frimware its better to install and hope fix it.

Dear sir, We have a router with model No. TL-WR743ND Unfortunately we upgrade its frimware to the 3.12.16 Build 110829 Rel.39880n Version and after updating its wifi does not work properly and...