The details depend on the type of phone and OS being used. But somewhere in your phone app you should find a list of blocked numbers. You just need to unblock that number for future texts. I can't answer if that will restore the text that you marked as spam; it may be lost for good.
For more detailed instructions, give us your phone make and model.
Hi, leema25. I will do everything I can to help with your text message issue. I just need to gather some more information to best assist you. What is the make and model of your phone? What message app are you using? Where did you block the number from on your device; was it from your contacts list? We will be standing by to assist you with all of your customer service needs. Have a great evening.
Follow us on TWITTER @VZWSupport
If my response answered your question please click the _Correct Answer_ button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!
Due to the age of this thread, it will be locked in order to keep discussions current. If you have the same or a similar question/issue we invite you to start a new thread on the topic.