T-Mobile US Folks, when roaming "ALWAYS" do the following:

- Go to Options, Networks,
- Set "Scan Mode" to Manual
- Select "Scan for Networks" from the Click Menu if No network is found.

This will ensure the device will actually drop the roaming network if in a poor coverage area and NOT try to roam onto a non-GPRS roaming network. Another idea is to put the SIM into a phone that allows you to set preferred nets and edit the preferred net list. Still it may try to roam onto other nets each time it looses the roaming partner network.

NOTE: Going from the US (GSM1900) to a GSM900 or GSM1800 network sometimes requires the radio to switch from GSM1900 to GSM900/1800 scan mode. You can force it by, "Radio Off", Power Off, Battery out (or Alt + Right Shift + Del). When powered back on it will normally allow you to scan for a network in 2 mins. Side note; sometimes when scanning it may say "No Networks", keep trying. The scan mode on Blackberries isn't the best

When you go to your home network, then reset back to Auto:

- Go to Options, Networks,
- Set "Scan Mode" to Automatic

Any roaming questions, pass them my way....