Back in May, I activated the international service on my Tour 9630. Since then, the device occasionally refuses to accept my password (required by my employer, who furnishes the BB). Doesn't happen every time I leave the local network area, but it appears to solve itself when I return. Any ideas why this is happening? Our IT group says it must be a network issue, not the phone itself. Could it be related to the switch to international service? I'd appreciate any suggestions.