When you use to use verizon, you could type *228 send on the phone to help update tower information. We have switched to Cingular recently and I wondered if that would still work, or if there is some other way.

I believe its pushed to you automatically with cingular

With GSM I believe the carriers automatically update the SIM chip over the air so manually undating a priority list isn't needed. I remember seeing a message every now and then with T-Mobile.

I have had Cingular for about 5 years now. They update automaticly and have for several years.

I did have some issues a year or so ago with the SIM cards on two phones. I had to go in to a Cingular store and get new SIM's put in them. I had those particular phones for about two years and never turned them off.

The SIM's got overloaded or something. Cingular reccommended that once a week I turn them off for a few minutes, then turn them back on. I understand this clears the SIM's of old stuff and ensures they update.

The closest thing that Cingular has to *22899 is the Start Provisioning. Go to Options > Network > press scroll wheel, select Start Provisioning.

I've never seen that option on a Cingular BlackBerry (or any phone for that matter).

But as mentioned before, GSM carriers automatically push out their equivalent to a CDMA PRL, but the phone must be switched off for a few minutes every so often to receive updates.