Hi, download official 2.2/2.3 for U8800Pro and copy it on the MicroSD card via usb card reader.
Turn off the phone , insert MicroSD card and hold vol up, vol down and power buttons at the same time.
Phone will turn on and start installing official 2.2/2.3
When install was comlete, you are done.
Phone: Xiaomi Red Rice WCDMA
Recovery: TWRP 18.104.22.168
ROM: MIUI V5 - REDMI EXPERIENCE 4.3.1 JB 4.2.2
Phone 2 : Huawei IDEOS X5 U8800 - sold