To check cellphone messages from a landline, call your cellphone and hit the * or # key when the call goes to your voice mail, depending on your service provider. When prompted, enter your voice mail password, followed by the # key. You can now listen through your cell messages.
Your cellphone password is usually a four-digit number. In the event that you have never set up a voice mail password, you must call your service provider to do so. There is also a chance that your service provider uses a different prompt key other than the # key. You can try other keys if the # key doesn't access your voice mail, or call your service provider to see what key they use. AT&T, for example, uses the * key instead of the # key.
Aside from checking voice mail messages, you can also carry out other actions from a landline phone. After listening to your messages, listen to the prompts informing you of what other actions you can take. These actions generally include managing messages, changing your greeting and customizing settings.
These same steps work when needing to access voice mail messages from another cellphone or when traveling abroad. If any problems arise, call your service provider for assistance.