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Apple iPhone 4

iOS5

iOS4

iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.

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I can't use tethering on my mobile phone

This troubleshooting guide will take you through a number of possible causes
to help you find a solution to your problem.

Turn on data roaming.Detailed instructions.

Step 1 of 5

1. Tap Settings.

Step 2 of 5

2. Tap General.

Step 3 of 5

3. Tap Network.

Step 4 of 5

4. Tap the indicator next to Data Roaming.Depending on the current setting, the function is turned on or off.

Step 5 of 5

5. Tap the Home key to return to standby mode.

Did this solution solve the problem? Yes No

Possible cause 3:

You're abroad and data roaming is turned off on your mobile phone

Solution:

Turn on data roaming.Detailed instructions.

1. Find "Network"

Tap Settings.

Tap General.

Tap Network.

2. Turn data roaming on or off

Tap the indicator next to Data Roaming.
Depending on the current setting, the function is turned on or off.

3. Exit

Tap the Home key to return to standby mode.

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