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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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impossible to make a call, other functions are ok

good or medium signal quality indicated, but impossible to make or receive a call.

other functions : ipod, apps, settings are Ok. is the logic board out of order ?

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If you can't make or receive calls, send or receive text messages, or access email or the web

Check the cell signal indicator in the status bar at the top of the screen. If there are no bars, or if it says "No service," try moving to a different location. If you're indoors, try going outdoors or moving closer to a window.

Check to make sure you’re in an area with network coverage. Go to your carrier's website to see network coverage areas.

Make sure airplane mode isn't on. From the Home screen choose Settings, then turn Airplane Mode off.

If that doesn't work, turn airplane mode on, wait 15 seconds, then turn airplane mode off again.

Make sure to include an area code for every phone number in your contacts list that you use to send or receive text messages.

If that doesn't work, turn iPhone off and turn it on again. Press and hold the Sleep/Wake button on top of iPhone for a few seconds until a red slider appears, then slide the slider. Then press and hold the Sleep/Wake button until the Apple logo appears.

Note: For iPhone (GSM models), if you enter the SIM PIN incorrectly three times, you may need to contact your carrier for a Personal Unlocking Key (PUK) to enable your SIM card again.

If that doesn't work, there may be an issue with your wireless service. Call your carrier or go to your carrier's website.

If that doesn't work, restore the iPhone software.

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2 Comments:

signal indicator in the status bar is OK. seems to have full signal

airplane mode is off

I removed the sim card and plugged it in another iphone 4 at the same place. It's ok, so there's no problem with the sim card

I've tried to turn off and turn on. No change.

I've tried to "reset". No change either

I've restored three times the iphone, activated it and it's the same problem.

Is it the logic board ?

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I noticed you accepted the answer but still have a question about it? I take it that it still not working? You should not accept an answer since it now appears like your problem has been resolved.

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