Your network can be the culprit causing the issue for the application. Sometimes, the network can be blocking the application usage for your phone. Several users solved this issue by resetting their network settings. Resetting network settings will renew all the information related to the network that you are using on your phone. You can reset the network settings by following the steps below:
Voicemail messages left on your mobile are automatically saved in your Visual Voicemail. If you wish to delete a voicemail message, simply tap the Delete button. The message will be placed in the Deleted Messages folder, but will not be deleted from your voicemail (you can restore these messages later). To permanently delete messages, go to the Deleted Messages folder and select Clear All.

Before you push record, be sure to tell the person on the other end of the line you're recording; depending on your location, you may be breaking a law if you don't. Some US states—like New York and even the feds—only require one-party consent, which means you can record without telling the other person or persons. In California, all parties must know they're being recorded—even if the recorder is out of state. Under federal law, one-party consent is okay, but only if you're part of the conversation; otherwise that's considered eavesdropping.
Your voicemail inbox has a limit of 100 messages with a 10 minute maximum per message. Each voicemail will be sent to your registered email address in .wav file format. If you want to save your voicemails, we suggest keeping the emails and deleting the messages on your magicJack to create space for new incoming messages.