iPhone Calling

How can I block a phone number on the iPhone (calls / texts)?

Need to block a specific phone number from calling or texting your iPhone? It could be telemarketers, spam text messages, or that crank that won't stop calling and messaging. Apple's iOS does not have a built-in feature to block a phone number, but there are other solutions.

UPDATE: Apple has added a block list to iOS. For instructions on how to block calls, messages and FaceTime with iOS 7 or later click here.

How do I save / dial an extension on the iPhone?

The iPhone will store and dial extensions to phone numbers in a couple of different ways, depending on how you decide to interact with the answering system on the other end. Entering the extension into your Contacts is simple. When you finish entering the last digit of the main phone number, tap the +*# button in the lower left corner of the dial pad. Two options are given: pause and wait.

store extension number iphone

How can set the number of rings on my iPhone before voicemail picks up?

You can set the iPhone to wait longer or shorter than the default 20 seconds before it goes to voicemail when receiving an incoming call. This will result in a different number of rings before the voice messaging system picks up the line and plays your outgoing message. To change the amount of time the iPhone will ring follow these steps:

1. Open the phone app and dial *#61# on the Keypad. Press the Call button.

Apple Explains Differences Between GSM and CDMA iPhones

Apple has released detailed support information explaining the differences between iPhone calling features on the AT&T and Verizon networks. Because AT&T Mobility uses GSM technology and Verizon Wireless has a CDMA network, each iPhone 4 has different calling capabilities. Recently it was revealed that Verizon's network suffers from conference calling limitations, but there are other differences as well. The table below was released by Apple to illustrate the details.

apple iphone differences calling features verizon att

Verizon iPhone 4 Has Conference Calling Limitations

Several differences between the Verizon and AT&T iPhone 4 have already been revealed, including changes in the antenna design and other components. What might surprise some people are actual differences in calling capabilities between the two devices. It's not clear whether or not these differences in functionality are due to Verizon's network technology or some other reason, however business users will especially be interested in these calling limitations.

apple iphone 4 verizon wireless CDMA conference call limitation

Unlike the AT&T iPhone 4 pictured at left, the Verizon iPhone 4 doesn't allow users to swap between calls on hold when adding calls to a conference. In fact, both calls pictured here are simultaneously connected and must be hung up together on the Verizon iPhone. In contrast, the AT&T user can switch between calls or join them together to create a conference call.

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