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T-Mobile MDA III User Manual
54
3.9 Securing Your Phone
You can customize the level of security you want to have on your T-Mobile MDA III by locking the
keypad, the entire device, or the SIM card.
Locking the keypad
The keypad lock turns off the keypad functionality. This is a helpful feature if, for example, your T-
Mobile MDA III is turned off and in your pocket, and you want to prevent accidental keypress.
1. Tap > Settings > System tab > Button Lock
2. Select Lock all buttons except Power button.
3. To unlock your keypad, tap Do not lock buttons.
Locking your T-Mobile MDA III
Locking your T-Mobile MDA III prevents access to personal data. When you enable this feature,
your T-Mobile MDA III will automatically lock after a specied time of inactivity. A screen will be
displayed requiring your T-Mobile MDA III "lock password" before access is granted.
1. Tap > Settings > Personal > Password.
2. To enable this function, select how long your mobile device must be turned off before the password
is required for using the device, by tapping Prompt if device unused for.
3. Select the type of password you would like to use: Simple 4 digit or Strong alphanumeric.
A strong password must have at least 7 characters that are a combination of uppercase and lowercase
letters, numerals, and punctuation.
4. Enter the password, and if necessary, conrm the password.
Locking the SIM card
You can protect your T-Mobile MDA III from unauthorized use by assigning a PIN (Personal
Identication Number). Your rst PIN is assigned by T-Mobile.
1. On the Phone keypad, tap Tools > Options > Phone tab.
2. Select Require PIN when phone is used.
3. To change the
PIN at any time, tap Change PIN.