I'd use it if I was in his position because of the full end to end encryption for Email with private certs (and handsets), a feature you can only really fully do on BB's. This sort of encryption is possible on Android but it's not as neat and effortless. I'm not aware of any publicly available BB Handset that supports Call Encryption though (aside from the built in GSM/UMTS setup).
For the record nearly every phone is the same when receiving signal and at most they vary by about 5% in lab conditions. What's more important is how many calls are going through the network cell tower / half-rate mode being enabled / how you hold it
There is the odd handset that is REALLY bad (A Cheap Samsung from 2008 has the record at 6%+ drop call rate afaik) but by and large every handset has between 1 and 3% drop call rate.
For the record nearly every phone is the same when receiving signal and at most they vary by about 5% in lab conditions. What's more important is how many calls are going through the network cell tower / half-rate mode being enabled / how you hold it
