Amazon Web Services: Phone Number Verification. Why doesn't it work?

Question

Amazon Web Services

Sign up for AWS. Got to confirm the phone number. I specify my SIP number, I use X-lite as a SIP client. The call goes through successfully, I pick up the phone. There is silence for 30 seconds, then it says follow the registration page for further instructions. Pin as soon as he didn’t enter: both during silence, and when he starts talking, and when he finishes. And quickly entered, and slowly. On the registration page, it usually writes “incorrect pin entered”, or does not write anything, but simply calls again.
In general, for several days I have been trying to confirm the number, each time I spend the maximum number of attempts, after which I wait 12 hours ...
Tell me, what could be the problem.
Recommend a SIP client in which you can dial numbers, and so that the sound reaches the subscriber at the other end. Although like X-lite it does.
Thank you in advance.

Answer 1

indicate the mobile phone, I remember that both my friend and I confirmed it the first time without any problems.

Answer 2

I had a problem with confirming the phone, as a result I contacted technical support. The person called back and the registration problem was solved. I don't use SIP, unfortunately.

Answer 3

I also did not accept the code from my mobile phone (I called from my mobile phone). but there was an opportunity to dictate figures by voice.

Answer 4

I used to work with mobile confirmation. And now I tried different mobile phones, played wav files into the phone and nifiga. But I called the usual city apparatus and it was confirmed without problems.

Answer 5

I tried from home, and from mobile and voice. I've been trying for 3 days now. I wrote to support - silence. What to do?

Answer 6

just missed me
after the third attempt