Having trouble saving phone numbers that start's with 0 in database

That does seem to present a problem, you’re right. My bad for not thinking of that situation :blush: - You could still save with + prepended and see if aircall will read the numbers (no need to require a certain character length if you visually show people you are attaching “+[whatever]” to their entry). I know this isn’t ideal but it could work in the interim. I’m not able to test the “leading 0” bug right this second but I’ll report back when I get to it, that’s an interesting problem that definitely deserves attention. Have you filed a bug report? The Bubble staff is pretty quick replying to issues like this.

https://bubble.io/bug_report