Settings→General→About.
1. version field is the version of your software (i.e., Mobile OS X),
2. modem firmware is the baseband firmware version
Simply tap the phone number in Safari web.
iPhone can call the number.
In an important meeting, you forgot turning off your ringer and you got an incoming call.
If you want to make it silent, press sleep/wake button.
If you would like to hide your identity for some reason, you can
configure your iPhone not to show your caller ID:
1. On the Home screen, tap Settings. The
Settings application appears.
2. Tap Phone.
3. Tap Show My Caller ID.
4. Tap the Show My Caller ID On/Off button
to change this setting to Off
Safari in iPhone is intelligent enough to recognize different chunks of the web page.
If you want to see some part big, double tap the part you want to watch.
Then the chuck will fill the entire screen.
If you double tab again, it will go to original view.
When you writing, you may see iPhone suggests some words.
If you want to accept it, tap the Space bar.
On top and right side of iPhone, there is sleep/wake button.
After using the iPhone, if you click it once, the iPhone immediately goes into standby mode which saves power.
