Here's a collection of Ubtel stock ROMs / firmware. we'll keep adding to the list.
Ubtel stock ROMs / firmware
Ubtel Q1
Download
Ubtel U6 (update.zip)
Download
Ubtel U8 Yunos
Download
Ubtel U8 MT6592
Download
Ubtel U9 (update.zip)
Download
Credits: Firmwarefile
