Switched from a CDMA to GSM for my new iPhone 4s. Facetime and iMessage do not work.

If I understand you correctly, you switched from a CDMA iPhone to a GSM iPhone and ported your number to the new phone. If you registered your CDMA phone with Apple, try unregistering it by:

1. Go to: https://supportprofile.apple.com/MySupportProfile.do
2. Log in if not already logged in
3. Click on ">" to the right of the CDMA phone listing
4. Click "unregister"

After doing this I would wait a while for this change to be updated witht the servers, then turn iMessage and FaceTime Off, wait a couple of minutes, then turn back on.

No, it won't effect anything on your phone but unregistering I doubt unregistering your GSM iPhone will help. My suggestion was an attempt to clear up any confusion on the servers with which phone was active. If your issue is that you see the message "waiting for activation" under iMessage in Settings>Messages, then this has been a widely discussed issue in these forums and there doesn't seem to be any one clear solution. Some of the things that you can try include:

1. Go to Settings>General>Date & Time, make sure Set Automatically is set to On.
2. Be sure you are able to send and receive messages.
3. Call your carrier to see if they are blocking premium texts or third party texts (a silent message is sent to the activation server to activate these services)
4. Also make sure in Settings>General>Date & Time that Set Automatically is turned to ON. If not turn it on then go to Settings>General>Reset>Reset Network Settings
5. Change the DNS servers on their wireless router to 8.8.8.8 and 8.8.4.4

You can search the forum for "waiting for activation" and you'll find many posts. Perhaps you will find one that works for you.

Yea, there are a lot of them out there. Couple other "fixes" I've read are:

1. Go to Settings>Messages>Receive At, tap your Apple ID, tap Change Location and select the country you are in if it's not correct.
2. Try signing out of your Apple ID for iMessage, resetting your phone, then sign back in.

Good luck though.

what if my iphone has not been registered and its new, please help me on how to register an activate.

<Personal Information Edited by Host>

Regretfully it does not look like Randers is working for Apple anymore, so suggestion to start your own thread with description of the problem may be a good idea.

No one here works for Apple, including Randers. This is a user forum.

In general, posting to a thread that has had no activity for 3 years is not an effective way to get help. Especially when the problem appears to be unrelated to the subject of the thread. @fromsouth's suggestion to start a new thread is spot on.

KiltedTim wrote:

No one here works for Apple, including Randers. This is a user forum.

No one here can match his level of expertise in icloud. That would be icloud engineering level, but if you say so... Too my opinion big loss, 2011 when he started and now he is gone. I would be the happiest guy if he comes back ( as volunteer would ) the only person, besides turingtest with such level of knowledge in their respective area. Correct way to say what you have meant would be no one here can represent Apple according to TOS. Please report that post for removal as soon as you read it.

KiltedTim wrote:

No one here works for Apple, including Randers. This is a user forum.

Well, that's almost true. Apple employees can participate here, but only in mufti (or as Community Specialists, whose roles are very circumscribed). So if, say, an engineer did participate, there would be no way of knowing.