[HD2 General] sinned69:
I've had my HD2 for about 6 months without incident. I'm using "dZenkinZ's Merlion" ROM.

Had this lock screen happen on my HD2 a couple of days ago where like most others in this thread have been required to enter their PIN/Password which isn't accepted. I'd setup my HD2 with a PIN for both the SIMcard and to unlock the HD2. Always worked fine until...

I'd installed a couple of new maps (China) and edited the gmsup file to read "LOCAL_VER=TAIWAN" in GarminXT (GarminXT 5.00.30W-ASN). When I restarted GarminXT it was displaying CHT (Traditional Chinese language), which I changed back to English. Now I've been running GarminXT since like way before I'd bought the HD2 (I've a HTC P3300 [Artemis], and HTC P3700 [Touch Diamond]) along with R66, MapKing2007, Destinator 6 & 7, along with loads of other work related apps. All have worked fine until now.

After altering and mucking around with GarminXT as I've done hundreds of times before, everything appeared to be in order. I'd used the HD2 for the usual, receiving and making calls, sending and receiving SMS's etc. The phone would lock and unlock with my usual basic 4 digit numerical PIN, without any problem.

A day or two after having made the GarminXT changes I was making a 300-350km journey and was using GarminXT GPS. Twice on the journey GarminXT displayed a popup that it had run out of memory and needed to shut down. In my 3+ years of using GarminXT I'd never come across this and certainly never on the HD2. After the second time this occurred on the journey I decided to power the phone off and then after a moment, powered back on. As usual the HD2 requested my two PIN's, one for the SIMCard which worked and the other to unlock the phone. This was rejected with the "wrong password" popup. I know that the PIN was correct as I use a simple 4 digit numerical PIN which is the same as I've setup for the SIMCard.

Eventually after multiple attempts, I got the "too many incorrect password attempts, enter a1b2c3" message etc. I've tried entering "1234" "0000" "999" "9999" and read multiple threads on this issue since...

Tried the soft resets, battery out, switch-on switch-off, all of no effect. I tried connecting to ActiveSync on my two computers in the hope that the automatic password would work since I'd set ActiveSync to auto unlock the device on connection... unfortunately it didn't work. ActiveSync asked for the phone to be unlocked on the device even though it recognised it. On one of the computers I deleted the paired connection in the hope that it would be overcome, but to no avail.

In my searching a few theories are floating around as to how this bug can be bought about, one of which concerns issues with installing Traditional Chinese, though I'd not come across this before on my HD2. So I don't know how valid a theory it is. But if it saves someone else from this friggin nightmare then so be it. No matter what it seems so coincidental that the only thing I'd played around with had been GarminXT and the resulting Traditional Chinese character display on the next restart of GarminXT & then subsequent memory issues while using GarminXT. Makes me think that this might be one of the possible plausible theories.

In the end I've had to do a hard reset, which will now involve me using my last known "spb backup" & PPCPimBackup" files, but it's still a Fcukin pain in the arse.