Calling Netspend Customer Support is another highly practical option to activate your deep blue debit card activates. All you need to do is dial 737-220-8956 or 1-866-387-7363 to reach Netspend Support. Inquire about how to activate a DeepBlue debit card from the agent. Your social security number and the security code you must have received in your activation mail will be requested by the NetSpend customer service agent. Once your identification has been verified, your Deepblue debit card will be available for use.