HI. Im trying to communicate my android mobile phone with arduino via hc-06 module. I don't know why but only the S2 tem BT works. The blueterm and blueterm+ doesn't work. The red led is always blinking. Any idea how to resolve it?
Looks like an Android problem. I guess you didn't spell term properly and the programme that works is called S2 Term BT. This does not come up in the Google store and thus sounds like it is a programme exclusive to the Galaxy S2. I assume this is the Android you are using and perhaps it will not allow non-Galaxy-specific terminal programmes to run.
So - not merely an Android problem, but a Galaxy problem.