Treo comes under mobile coverage

[isi2isi]

How can I determine whether Treo 650 is comes under mobile coverage.

[isi2isi]

Two quick ways to know when you're connected to your mobile network: the flashing LED light and the signal strength indicator.
If your LED light is blinking green once per second the wireless mode is on and you're within an area of mobile coverage.If your LED light is blinking red once per second the wireless mode is on BUT you're NOT in an area of mobile coverage.


http://www.zolved.com/synapse/view_content/6006/How_do_I_know_when_my_Treo_650_is_within_an_area_o f_mobile_c

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How to change ringtones such as adding or deleting on Treo 650?

Whether you only use the built-in ringtones, or your have added more (details below), it's easy to change from one ringtone to another

Changing the ringtone for Phone, Messaging or Calendar
The built-in applications have a one-stop shop for switching tones.

Press Applications Launcher .
Launch the Prefs application.
Under the General heading, select Sounds & Alerts.
On the Sounds & Alerts preferences screen, choose an application from the pick list at the top of the screen.
To change the tones that play, tap on the Tones box near the top of the screen for each application.


http://www.zolved.com/synapse/view_content/6041/Ringtones%253A_changing_adding_and_managing_on_a_T reo_700p_or_65