Re: Possible Solution
I have to say... if a car I bought was doing this, I'd be sending it back or selling it off.
If even the DOORS can't be opened, what else did they do wrong on that car? Doors are literally a £2 RF module with whatever-crap-encryption-they-use, and a relay. It's REALLY hard to go wrong there, and they should actually spend 10 times more time on making sure people can't easily clone keys, not worry about whether it interferes when near a telephone. The blip of an RF fob is literally hundredths of a second, there's no need for it not to respond immediately even if it has to retransmit 20 times.
And the doors locking themselves while I'm driving? No way. I'd be servicing that. What happens if you roll the car and need to get out or (vice versa) you're giving a friend with a kid a lift home and the door just unlocks and they open it (have had the latter happen - a child dropped their toy down the side of the back seat while the aunt was driving and I was in the passenger seat... the child decided they couldn't reach so they OPENED THE DOOR at 60mph and leant down to pick it up... the first I knew was all the door warnings going off, and I looked behind to see empty air and a small child bending out the exit, and I've literally never moved so fast - belt off, over seat, grab child, grab door handle, SCREAM to pullover)? No child locks "because they don't work", a kid that just opens doors / removes belts to get a toy, and an inattentive driver who didn't even know what the beeping meant.
My car - I've never had a problem except that it's very insistent the boot is shut before you can arm the alarm (rightly so, but it takes you a minute to realise why it won't arm - and that you took the shopping out, and though it "looks" shut, it just needs a proper slam to actually be shut), and that you can unlock the damn thing from somewhere around the next town (the RF range is ludicrous - literally my car can be out of sight and it still gets the signal somehow! I tested in a 28 acre site and can lock/unlock it from ridiculous distances). Great if I lose my car at a boot sale (because the lights will flash), but not so great if the keys are in my pocket and unlock button gets pushed.
However, literally, it's never been a problem. If I had symptoms like yours, though, the car would be going back.