Its a pain the firmware is not really upgradable to the v10 so you could then just install the lan or wifi cards and use the app. May be cheaper to buy a stand alone gsm dialer and wire it into a output.
As for it not working on EE this is from the pyronix site.
The GSM Modem will work on...
Also the bell box wont do anything until the power as been applied and then the rear and front tamper as been pressed in. If you wire it up but don't put the back tamper screw in and lid on and just try and test it you will get nothing.
So when you have come out of engineers it will set without any faults first time but after you have unset it and then try again its then you get the fault?
Does sound a strange one, have you tried setting the alarm with another code (master manager code) all I can think is maybe the tag user is setup to set a area that doesn't exist but not sure. But it usually would log an alarm.
If you have a wire to the bell box I would buy a deltabell plus module and wire that in then you will have a bell box that lights up and you dont need to worry about the battery.
First off you need to make sure that you have a firmware software that supports the app. If its a older enforcer panel I don't think it will recognize the wifi module.
You can find this out by going into engineers and going to software revision.