Yes, you can continue using your Dingtone account. However, it is recommended that you deactivate your Dingtone account linking to your old phone number and re-activate it with the new phone number. If you do not do this, contacts with your new phone number may not be able to find you on Dingtone and unlimited free calls and texts between Dingtone users can’t be achieved even though you can consume Dingtone credits for free calling and texts.