D-Link → [Help Me] Help for Downgrade DIR-628 1.2xNA to 1.13

My Technical for my ISP without consideration upgrade my firmware for the last available, i use 3g usb and work without any problem before upgrade, i need to downgrade the firmware i don't want to buy a need one

Can you be more discriptive of the problem after the FW upgrade?

Review this and see if anything helps:
ttp://forums.dlink.com/index.php?topic=54498.0

I don't believe you can downgrade once the FW goes beyond v1.1x to v1.2x and its not recommended to downgrade back.

Well i had 1.13 Firmware and the option for USB have 3G in dropdownbox , now i don't have this option and my USB 3G doesn't work with the new firmware

I would phone contact your regional D-Link support office and see what they can do or offer any alternatives.

I found 1.24EU and 1.24WW Firmware but i need to downgrade from 1.25NA, EU and WW allow 3G USB conection , does anyone try to downgrade in 1.2X range

Try this:
»forums.dlink.com/index.p ··· =42457.0

Just factory reset, send the v1.24 file and factory reset once more after...if your at 1.25 now, then you should be able to go down to v1.24

have this message, i've try with 1.20 1.21 1.22 1.24

Upload Failed

The uploaded firmware file may not be correct. You may have uploaded a file that is not intended for this device, or the uploaded file may be corrupted.

If the uploaded file is correct, it is possible that the device may be too busy to properly receive it right now. In this case, please try the upload again. It is also possible that you are logged in as a 'user' instead of an 'admin' - only administrators can upload new firmware.

The Gateway will not be reprogrammed.

Ya your stuck with whats loaded currently on the router.