Hello All - here is the story thus far;
User has Windows Mobile 6.1 phone stolen in March. We block his account as the thief deleted all his email, calendar and contacts straightaway. SIM is blocked.
Phone stays off net until 10 days ago when we start seeing user's account continually locking out. We manage to trace it to the device which still has the users credentials (correct login name and outdated password).
We do a Blacklist with Vodafone and block the IP address for the phone on our firewall last Friday. All is well until today and we start getting credentials coming through. VF have confirmed blacklisted on their network but it may be on another network now i.e. XT or 2D. 2D don't offer a blacklist capability. We have now added this IP address to block at our firewall, but we will hit the same issue once the thief put another SIM in it again or powers off the phone and powers back on.
We have attempted a remote wipe, but this won't work with outdated credentials.
Options as I see it;
1) New account for our user (painful)
2) Reset users password to be what it was when phone was originally stolen, so that the credentials authenticate and it gets the remote wipe command (risky)
3) Continue to monitor and block any new IP addresses as they come up (a huge PITA!!!)

VF claim they can't map the IMEI of the phone back to a connection number when it was on their network - strange?

Any other thoughts or ideas?

Cheers

Kieron