I am download firmware developer version of mi wifi r3g: http://bigota.miwifi.com/xiaoqiang/rom/r3g/miwifi_r3g_firmware_0a271_2.26.3.bin
I change the name to "miwifi.bin" and i put it in usb stick with fat32 format. I put the sub stick in router. I power off the router.
Then, with a clip I keep pressing the back button of the router. Without releasing it, I turn on the router and wait a few seconds. Now the led of the router should turn off and on, but what it does is leave a blue light for several milliseconds and return to orange. Several seconds later, the orange light flashes only once.