Voice mailbox full
How do I fix voicemailbox full after I clear my voicemails
iPhone SE (Gen 3)
Question marked as
Voicemail is never stored on your iPhone, but on your carrier's server.
An example here from my carrier: unheard messages are stored for 8 days. Messages you've listened to will be gone after 24 hours. Longer storage is also possible. Press 5 while listening to your message and it will be saved for 7 days.
The voicemail settings are controlled by the carrier, so contact your carrier.