my modem hardware version is v3.1 and i accidently upgraded it by v4 hardware firmware ... at now my modem firmware version is TD-8817_V4_100524 but before upgrade it was TD-8817_v3_090211 ... my...

Region : Iran Model : TD-8817 Hardware Version : V3 Firmware Version : V4 ISP : Parsonline hi Accidently I upgraded my router with v3 hardware version by v4 firmware and when i want to downgrade it...