Sign up problem- Is there any solution?

Hello Steemit Feedback team,

I joined Steemit last April and I continue to enjoy it. I started sharing in many communities. Thanks to Steemit, I met new people and learned many new things about blockchain and cryptocurrency. In addition, the income I earn thanks to Steemit motivates me. I tell Steemit platform to my relatives and friends. They also want to participate. I registered my sister (@perperok) and cousin (@iwrem) first. I registered from the main page, as indicated in the image below. However, two weeks ago, I ran into a problem registering another cousin (@warsey).

First, I wrote the name I will use on Steemit. Then I wrote my e-mail address and sent a code to this e-mail address. I wrote the code that came to my e-mail address here. Finally, I wrote my brother phone number and waited for the code to come, but it did not. I tried two more times, but it did not work. I could not try any further as I had reached the daily limit for a phone number.

Now I have invited my brother to Steemit, but I can not register it. It does not send codes to phone numbers. I even tried different phone numbers, but it did not work.
I want to invite more friends but I am having this problem during registration.

I wanted to inform you about this. I look forward to your support for a solution.

cc:
@steemitblog
@steemcurator01
@cryptokannon