Welcome to WPML support. Would you please go to the Advanced Translation Editor and in the top section, search for the Phone number and see if it appears for translation?
If the issue persists, please create a dummy page and only add the widget in question and the phone number, get back to us with the link to the dummy page.
I'd appreciate it if you could give me the URL/User/Pass of your WordPress dashboard after you make sure that you have a backup of your website.
It is absolutely important that you give us a guarantee that you have a backup so if something happens you will have a point of restore.
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That way I will be able to see the code under the hood and try to provide you with custom XML code that will force WPML to understand that phone number for translation.
I'd be happy to check. I'd appreciate it if you could give me the URL/User/Pass of your WordPress dashboard after you make sure that you have a backup of your website.
It is absolutely important that you give us a guarantee that you have a backup so if something happens you will have a point of restore.
Make sure you set the next reply as private.
Please tell me which page to check and I will try to see if I can find a way.