Call and Text Reminer Alerts

I'm sure this is somewhere, but I can't find it. I need text and call reminder alerts, but I can't find a setting to turn it on. When a call or a text comes in, I get the initial alert tone or ring tone, but if I miss the call or text, the phone doesn't give me any more alert tones that I have a missed call or message. If the phone is in my purse or if I leave it on my desk when I leave the room, I miss the initial alert/ring. People are really getting annoyed at me that I'm missing their texts or not responding to their phone calls that I'm constantly having to check the phone to see if I missed anything. My previous phone would give an alert beep every 8 or 10 minutes until I viewed the missed message or checked the call list for the missed call. I want this phone to do that, too. How can I make it do that?