Slightly off-topic, but this may be of use when testing OpenBSC... Some mobiles made by Pantech have an engineering mode built in - displays various parameters of the network like LAC, BSIC, ARFCN and signal-strength (C1 value) of serving and neighbour cells, TMSI assigned to phone, timing advance etc. The two models I've played with are: PG-C3 - very comprehensive data (10 screens of it!), engineer mode persists when power-cycled, but US tri-band, so does not cover 900MHz band. PG-C520 - quad-band, but data not so comprehensive (e.g. no timing advance), engineer mode does not persist I bought mine from an Ebay shop in the USA: http://stores.shop.ebay.co.uk/Khala-Ki-Dukan__W0QQ_armrsZ1 Both models were < 100 Euro, even with postage from the States and import tax. If anyone's interested, email me and I'll post some screenshots. Does anyone know of other phones with built-in net-monitor / engineer functions (other than the old Nokias!)? Thanks, Mike H.