Mobile Number for user profiles of my customers

[Mayssam Ismail]

I need to add mobile number custom fields to my user profiles if that is possible without additional addon, 

[Alexey Matveev]

Hello,

You can use user properties. You can find more info here:

https://confluence.atlassian.com/crowd/specifying-a-user-s-attributes-18579612.html

But you will not be able to see this attribute in the issue create, edit or view screens.

If you want to show this info in an issue screen, you should use an add-on. You can try the Power Custom Fields add-on. It is a free add-on:

https://marketplace.atlassian.com/apps/1210749/power-custom-fields?hosting=server&tab=overview