Help with BBM notifications

I have two BlackBerry 10 devices - a Z10 and a Q5. I like to switch them up at times as some times I'm looking for media consumption and other times to write messages etc. I also use BBM quite a bit. What I'm wondering is the following. Is there any way to stop sending notifications to my BBM contacts every time I switch phones? They all know I have made the switch to BlackBerry 10 and I would prefer not telling them every time I switch devices. People are starting to get annoyed and wondering if I've got some real issues with my BBM.

Any help in finding a way to disable that notification would be appreciated.

I believe that's a msg that comes through on BlackBerry's BBM for everyone each time you switch.