disable message "Your carrier may charge for SMS messages used to activate iMessage"

I too have this very annoying issue. I had activated Facetime earlier, but now I do not want use it. I tried the steps mentioned in this thread, but still the popup is keep coming. Very much disturbed with this issue. I am using iphone 6 with IOS 10.3.3. Please help.

to be honest, i seriously think the ios is full of flaws.

despite not activated and off mode, the phone can silently send activation sms out.

as you have guess, numerous roaming sms is charged, and the tech support claim its a silent sms by the phone to reach the server, and no way to stop it?

guess what the senior tech support escalated to software engineer despite multiple DFU restore, stuck in a limbo.

if you have a problem, apple cant solve it, just prolong you and asking you do kiddy stuff which is seriously puzzling.

for those who have similar problem, i observed a weird syptoms, the phone can send out sms despite sms centre is hard coded to remove the country code.

example +44 1234567 is the sms number, hardcode it to 1234567, sms still works normally.

but on a normal iphone which do not have this issue, hardcode to 1234567 will result in sms sending failure.

DFU after DFU restore as per proclaim it cant solve all the bug, it is not the case.

the hardcode bug is present, which mean imessage silent activation bug is present too.

so being a apple user, we have to pay tons of roaming sms for their software malfunction.

i do seriously think how common is this issue?

mine does not even show prompt, just keep sending roaming sms without my knowledge.

because my local carrier in my local country dont charge, so i didnt even know this happen until i am oversea.

apple failed badly in support, any support that prove worthy is around?

reading through the post, yet to see any.

a common folk can do better than apple, its a shame of their software engineer.

So then after you have signed out do you need to leave iMessage and FaceTime turned on? Or do you turn them off?

I have done this and the iMessage messages seem to have stopped but am still getting FaceTime activation messages. Is there some other app or setting that could be triggering it? FaceTime messages only started since latest OS installation. Thanks.

... and don't play with this:

Deregister and Turn Off iMessage - Apple Support

if you do it (i.e. you unregister your number) then you have to start from the beginning.

So you did the following:

• Go to Settings/Messages
• Turned it on if it was off
• Tapped Send & Receive
• Tapped on your Apple ID
• Tapped Signout on the dialog that appeared

I did this as you suggested.

It didn't work.

Still got the messages.

You should not get anymore. It had to send messages to deactivate your ID.

I tried too--it does not help.

Are you using FaceTime via your email ID or your mobile phone number?

Both. In my settings, FaceTime says I can be reached via my email and mobile number, and if I make a call, it goes out as my cell.

It appears again :(. But I did not get it for 2 days. Was it a partial fix, or not related at all--can't say for sure. Too bad that Apple cannot help, really annoying.

Same here its keep poping up while I playing games I have iPhone SE upgraded to iOs 10.2

Can't say anything else but try to repeat again, unfortunately. After I did all these steps I wrote about, I do not get this message anymore.

Try DISABLING two-factor authentication from your icloud apple id site.