Log in to your Drive lah account.

From the User dropdown select 'Account Settings'.

You will see Contact details tab open, with your current phone number filled in the 'Phone Number' field.

Enter a new valid phone number in this field.

Your new phone number will be saved in the system and you see a popup to enter the verification code that will be sent to your new phone number. Enter the code to verify your phone number.

Log in to your Drive lah app.

Go to the 'Profile' tab.

Select 'Contact Information' under the 'Account Settings' section.

Next to the Phone number, you will see and Edit button. Click on that.

In the edit screen, enter your new phone number and press save.

Your new phone number will be saved in the system and you see a screen to enter the verification code that will be sent to your new phone number. Enter the code to verify your phone number.