Acer E200 - Manual (Page 15)

15 Turning on for the first time
SIM card lock
Your smartphone may come with a SIM card lock, i.e., you will
only be able to use the SIM card provided by your network
operator.
To cancel the SIM lock, contact your network provider.
Turning on for the first time
To turn on your smartphone for the first time, press and hold
the power button until the system bootup screen appears.
Follow the setup screens to set up your phone.
Entering your PIN
When you install a SIM card for the first time, you may need to
enter a PIN using the onscreen number pad.
Important: Depending on your settings, you may be required to
enter your PIN each time you switch on the phone function.
If the PIN you enter is incorrect, a warning message appears.
Activating a new SIM card
If you are using your SIM card for the first time, it may require
activation. Contact your network operator for details on how
to do this.