dnscreative wrote:Hmmm... none the wiser!
There must be a factory reset on the handset? Maybe holding down some keys while it boots up?
If a built in factory hardware reset exists then invoking it will likely be something like this:
Turn off phone, holding down keys like * or # for 30 seconds, turn on phone whilst still holding down those keys.
NOTE: This isn't the factory reset for the phone but I would imagine if one exists it will be something like that.
Be aware though this type of reset often requires a fully working firmware.... and devices which retain a backup of the previous firmware. Indeed firmware updates are a great way of breaking devices preventing them from then receiving further updates or having configurations reset.
Fortunately internal firmware reset methods do often tend to exist, e.g: via JTAG flashing which is usually how the firmware is originally installed: http://en.wikipedia.org/wiki/Joint_Test_Action_Group
JTAG is *very* complex and involves taking the phone apart etc. This will likely be how be how snom will repair the phone - personally I would advise you to just pay them to do it. (or buy a replacement phone)