HI, about three months ago my upload speed suddenly dropped to 0 but download speed still normal , i called our isp , they said our internet speed is fine. I wanted to update the firmware because  maybe it's the problem but when i look for the right version of my router which is V3 i find only V2 ; the tplink website has only V2 for my country . pls any one can help or has any idea about what could stop the upload . Thanks!