you do not want to use any M series phone prior to release 18 on any BCM version higher than 3.5.
If you do you will have low volume issues on your phones.
The release number is printed on the bottom of the phone on the sticker.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.