Whatever fix was in the 7.1 patch didn't fix it for everyone. I have done everything people have suggested in this thread, and am still having problems. That includes three calls to AppleCare, the latest being this morning.
My entire family uses iphones. I have three Mac computers currently, and an iPad. My first Apple computer was an Apple IIe. My first iphone was the 3gs. I was the first in my family to use an iphone.
This week I switched to an android phone. I followed all suggestions in the thread before switching. Called AppleCare, and they revoked my certificate. I am still having problems with receiving texts from other iphones. I tested it this morning with two iphones that have been updated to 7.1. All my other Apple products have been deregistered, btw.
My wife sends a group to me and my son, putting me first. It sends as text. Son replies to all, it sends as iMessage. I never get it.
My son deletes my contact info. He then deletes all text conversations. Makes sure "send as SMS if iMessage can't be delivered" is turned on. He turns off iMessage, and then re-enables it. He reboots his iphone (5S, btw.) Now, with none of my contact information in the phone, he types in my phone number from the keypad to send me a message. It sends as iMessage. I never get it.
I call AppleCare for the 3rd time about this issue. The tech checks to make sure my phone certificate has been revoked. It has, and it has been well over 24 hours since that took place. I go through all the steps I have taken and how we have tried to troubleshoot the issue. She contacts level II support. Final answer: They are aware of the issue. There is a glitch in the system servers, and they are working on a fix. No ETA. There is nothing more to try, either on Apple's part or mine. According to the tech, this problem occurs with some users, and there is nothing they can do to fix it at this time.
My family is spread out and busy. I don't want to miss texts from them. I am not going to ask them to turn off iMessage. I see no way to resolve this other than getting a new phone number (ATT, btw.) As a long-time Apple product user, I am very frustrated. I would rather go through the hassle of changing my phone number, which I have had for a long time, then to deal with missing texts. After I change my number I will consider to what extent, if any, I want to remain an Apple product user.