How to delete my texts from my iPhone 4S

When ever I delete one conversation my phone stops showing any texts I have from people and won't let me text but when I turn it off and back on the conversation I deleted is back again and it keeps on doing that I've tried the Wi-Fi trick and I've tried deleting one by one but it's not working please help

What's the Wi-Fi trick? Hold down the power button at the same time you're holding down the home button, your screen will turn off, you can let go of the two buttons when you see the apple apear back on the screen.

  • Will software update on my iphone delete my texts? So yea ios7 comes out tomorrow & i always update my software in my phone's settings & i just want to know if updating will delete my text messages.
  • Why does my iPhone sometimes send texts to other iPhones as iMessages then regular texts to iPhones? Like when I send a text to my friend that has an iphone, it usually sends as an iMessage then it will randomly send as just a regular text and it will be green and not blue.
  • Unable to delete texts on iphone? I have an iPhone 5s and I have ios 7.0.4. Recently I have this problem where when I try to delete text threads on the messaging app, the app becomes super slow. Then I can't open any other texts or send texts to other people. So I reset my phone (home button and lock button held down) and when it turns back on I go to the messaging app and the text/texts I deleted are there again. I have tried restoring from backup and that didn't help any. Any help would be great thanks!
  • Just lost my texts and now i can't send texts? I'm on a tarrif where i get unlimited text 150 mins and 250mb of data (Vodafone) and i was texting my mother and all of a sudden my texts wouldnt send and then my network went it came up no service on my phone ( i'm using an iphone 3gs i don't care about what phone i have as long as i have one lol ) then my network came back on and i have my internet and my calls but don't have my texts can anyone help me to sort this out