timestamp on messages is wrong

1. My phone is turned off 2. 11:00 - My friend sends me a text message/sms 3. 2:00 - I turn my phone on. 4. 2:01 - I receive the text message/sms, the timestamp is 2:01 5. But I want the timestamp to be 11:00 How do I get this to happen? I am on a [ZTE Racer](http://www.gsmarena.com/zte_racer-3423.php) on [giffgaff](http://giffgaff.com/) in the UK. I have Android 2.1, Eclair.