You really should have loaded version .55 rather than .52, unless the .52 was a typing mistake on your part. http://www.blackberryforums.com/gene...ilanguage.html
Make sure the BB has two things:
1. Enter your TCP settings for your carrier at Options > Advanced > TCP. http://www.blackberryfaq.com/index.p...PN_settings%3F
2. Go to Options > Advanced > GPS > Menu > Refresh GPS to get your satellites to see the device AFTER the OS upgrade. You need to be outside in a clear view of the sky, probably from your location, with a good southernly view. Wait up to ten minutes for the refresh. You might need to try a second time.