BQ Aquaris M4.5 stock ROM can be downloaded from this post. If you are looking for the firmware for your BQ Aquarius M4.5 device then you are at the right place. Because this post gives you the link to download the said stock ROM.
Download BQ Aquaris M5 stock ROM and install it on your device to restore it to the official stock state. With a stock ROM your BQ smartphone will once again running on the default settings set by BQ. With that your device’s warranty will be restored — only if it’s still valid.
Here is the complete list of BQ stock ROM that you can download and install it on your BQ smartphones, tablets and feature phones.