Danhag FBH Kit Notes
From DISCO3.CO.UK Knowledge Base
GSM module: no network
Reported by Martin:
GSM module locked into "no network" state, pulling power did not help. Fix for me was to swap the SIM card for one from another network and then back to the original SIM.
Bear in mind that some operators use others' networks (e.g. in the UK Virgin Mobile use Tmobile, giffgaff use O2 and Tesco Mobile use O2).