Telraam S2 is fairly new and we tried to avoid issues as much as possible through extensive testing and debugging. Don't hesitate to get in touch if you appear an problem. The easiest is to e-mail us, with as many details as possible, on support@telraam.net
The device has an issue?
re-power the device
re-power the device while holding the main button to start up in debugging modus. Wait 1 minute, and take a picture of the screen to mail us.
check the connectivity on the screen: how many bars are illuminated?