HT201352: Get the latest version of iTunes
Learn about Get the latest version of iTunes
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May 3, 2014 1:59 PM in response to bbsmit127by pedro d,Hello there, bbsmit127.
The following Knowledge Base article provides some great, in-depth steps for troubleshooting cellular connectivity issues:
iPhone: Troubleshooting a cellular data connection
http://support.apple.com/kb/ts3780
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.
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Mar 2, 2016 6:07 AM in response to bbsmit127by weheritage,Most likely it is a software problem. Check to see if you have Modem Firmware. (mine is 6.01.00) If not you will need to download latest Itunes then connect your iPhone left click on the icon in the upper left corner and restore you settings Modem Firmware is found on your iPhone by going to Settings-General-About and then scrolling to the bottom
