I think on the whole I'm getting a stronger signal although I don't know whether this is because of the new radio (05.30) or the RIL. I think the phone has become a bit better at holding onto data signal with the new RIL but it's not a huge change either way. The Waterloo Bridge issue is still, well, an issue. It seems there's a huge signal black spot between the north side of the river on Embankment and Waterloo station where you can occasionally get a shard of signal, but it's largely a no-reception area and you can forget any data connectivity. I can only assume that this is problem with Orange (which takes the micky a bit considering a) this is in the wide open in the middle of the capital city and b) their tie-up and associated mast-sharing with T-Mob is supposed to be irradicating this very thing). Incidentally, I do seem to be getting more "missed calls" (i.e. phone not ringing, just getting voicemails left and according to the caller the call going straight through to V/M even though I apparently have full signal) but again I don't know if this is a problem with my phone or an Orange thing.
Regarding the RIL, is there any way of interrogating the phone to see if the RIL has been successfully installed or do you just have to assume that no installation errors = a good install? I know you can't see it in the standard settings as the baseband info doesn't show any additional info, but I was wondering if there was any second level info I could interrogate...?