I really like the simultaneous ring on both my home phone and the cell phone. HOWEVER, when my cell is low on battery or just dead, so is my house phone. I would like to still be able to get my calls on my home phone even when my cell dies, instead of having it ring once and then go straight to voicemail. This is a great feature but Verizon must allow the ringing to default back to the single line ring when one of the phones is unavailable, usually the cell. Great feature needing a fix!