Can we leave personal voice mail in iphone 4s.
Search "Visual Voicemail" in the iPhone User Guide (in Safari on your phone) if you want instructions to change your greeting.
If you're wanting to save voicemails that have been left on your phone, the following may be easiest:
Play voicemails back to a voice recorder, a PC with a mike, or another phone or iPod Touch with the voice recorder enabled. Then email or transfer back to your phone using iTunes, WiFi, etc.