iPhone 5C CDMA: Call connection delay/interruption

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iPhone 5C CDMA: Call connection delay/interruption

I currently have 4 iPhones (3 @5C, 1 @ 5s) on the Sprint network (via Ting) and all has been fine for the last couple of years. Shortly after updating to ios 9.2.1 we began experiencing a strange issue at the start of every call between phones on the account. The call is initially connected just fine, but that lasts for only one or two seconds - enough time to say "hello". But then the connection drops for 3-5 seconds before returning to normal. When it does return, the connection seems to abruptly change to a much higher quality, almost like the person on the other end is right next to me. I've worked with Ting support and have tried every reset, update, wipe/restore phone, roaming on/off, etc. Nothing fixes the problem. Would greatly appreciate a solution!!

Posted on Mar 18, 2016 3:54 AM

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Answer 1

pedro d

Community Specialist

Mar 19, 2016 2:37 PM in response to magmotif

Hello there, magmotif.

It sounds like you're having a particularly unique issue with making and receiving calls on your iPhone. The following Knowledge Base article provides some great information for troubleshooting:

If you can‘t make or receive calls on your iPhone

Check your iPhone settings

Turn airplane mode on and off. Tap Settings > Enable Airplane Mode, wait five seconds, then turn airplane mode off.

Check your Do Not Disturb settings. Tap Settings > Do Not Disturb.

Check for any blocked phone numbers. Tap Settings > Phone > Blocked.

See if Call Forwarding is turned on. Tap Settings > Phone > Call Forwarding.

Update your software

Check for a carrier settings update.

Check for an iOS software update. Some updates might require a Wi-Fi connection.

Remove and reinsert your SIM card

If your iPhone has a SIM card, remove the SIM card, then reinsert it.

Contact your carrier

When you contact your carrier, check the following:

Your account is set up to use your iPhone.

There aren't any localized service outages.

Your account doesn't have a billing-related block.

Your calls don't have errors on the carrier system.

Check your network settings

Reset your network settings. Tap Settings > General > Reset > Reset Network Settings. This will erase all current saved settings, including Wi-Fi passwords, preferred networks, and VPN settings.

Try to make or receive calls in another location.

Switch to a different network band. Tap Settings > Cellular and turn off Enable LTE, 4G, or 3G (this option will depend on your carrier and device model).

Still can't make or receive calls?

If you still can't make or receive calls, restore your iPhone as new.
If restoring doesn't fix the issue, contact Apple Support or take your iPhone to an Apple Retail Store or Authorized Service Provider.

Thanks for reaching out to Apple Support Communities.

Regards.

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