Please Follow the steps shown below to change your Phone Number :
Step 1 : Navigate to Setting page by Clicking on Setting Menu.
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Step 2 : Click on “User Details” menu.
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Step 3 : On User Details page you need to enter new contact number and click on “Send OTP” and you will get OTP on your phone.
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Step 4 : Enter OTP then click on save and now your phone number has been changed in your account.
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Thanks for your feedback!