TL;DR
Add Mobile Number field from the Fields Manager to the form you want to add Digits mobile number
Head to Ultimate Member –> Forms
![](https://uohelp.b-cdn.net/wp-content/uploads/sites/2/2018/11/614.png)
Editing Registration Form
1. Hover on Default Registration to see the Edit button and then click on Edit
![](https://uohelp.b-cdn.net/wp-content/uploads/sites/2/2018/11/974.png)
2. On the form builder click on Plus Icon to add a form field
![](https://uohelp.b-cdn.net/wp-content/uploads/sites/2/2018/11/529.png)
3. In the popup select the Mobile Number field to add that field to your registration form
![](https://uohelp.b-cdn.net/wp-content/uploads/sites/2/2018/11/164.png)
4. Make this field required if you want to keep it compulsory
![](https://uohelp.b-cdn.net/wp-content/uploads/sites/2/2018/11/1586337278.jpg)
5. Once all the fields you require including Mobile Number have been added, click on the Update button to save the changes.
![](https://uohelp.b-cdn.net/wp-content/uploads/sites/2/2018/11/264.png)
Editing Login Form
1. Similarly click on the Edit button for the Default Login Form
2. Click on the plus Icon to add the field
3. Select the Mobile Number
![](https://uohelp.b-cdn.net/wp-content/uploads/sites/2/2018/11/814.png)
4. Make sure all the fields you require are added and then Update the form