Lately, my received calls and text messages keep disappearing after i restart my phone, or when my battery runs down, and I charge my phone. I have no idea if it went to voicemail. Google claims that voice mail and call logs are on my,tmobile. However, i can’t find any such thing. I have read that updated iOS on iPhone causes such problems. However, I have only seen such things happen since two Sundays ago, and I did not update iOS.