Apple has released a new Web service that allows you to deregister a phone number from iMessage, on the chance you have switched to using a non-Apple device and wish to continue using your existing phone number for text messaging and other services with your new device.
When you set up an iPhone, Apple’s iMessage service is the default text messaging service, and will bind your email address as well as your phone number so messages sent to these can be accepted by any of your devices that use iMessage.
This has its arguable conveniences; however, because it does register your phone number for use with this service, if you move to another platform then this service may still capture and store text messages sent to it, in an attempt to serve them to you on a device that supports iMessage. Unfortunately Apple’s iMessage service is proprietary and exclusive to iOS and Mac OS devices, meaning that if you have switched to an Android or Windows phone, then you may not receive your text messages after having used an iPhone.
To do this, go to Apple’s Deregister iMessage Web page, where you will see two options. The first simply tells you how to go to the Messages settings on your iPhone and turn off iMessage, and the second has a field to enter your number. When you do so, Apple will send you a confirmation code that you enter on the site, and when done your phone number will be deregistered.
I have the problem of not being able to receive sms messages (i.e., anything other than iMessages) on my iPhone 6+ after upgrading from my iPhone 5s. I can send messages but can only receive messages from people using iMessage. Apple and ATT have not been able to figure out why this is but it has been the case since I got my 6+ several weeks ago. I would be very grateful for suggestions/thoughts/help!