If you are having trouble hearing your voicemails, there are a few things that could be causing the problem. First, make sure that your phone is not on silent mode. If it is, you will not be able to hear any sounds coming from your phone, including your voicemails. Another thing to check is the volume on your phone. If the volume is turned all the way down, you will also not be able to hear your voicemails. If neither of those are the problem, it's possible that there is an issue with the voicemail service itself. Contact your phone carrier to see if they are experiencing any outages or if there are any other problems with their service that could be causing this issue.