NOT supported here.
What model? These are the only supported pocket WiFi models:
Huawei E5330As-2
Huawei E5330Bs-2
Huawei E5330Bs-6
Huawei E5336Bs-2
Huawei E5336Bs-6
christianpantia25
What is wrong with the Bubbles option? Why bother with Chat Heads?
In my post/screenshot above, I also have Bubbles but it basically behaves and works like Chat Heads so it's all good.