Q: I cannot delete a single / multiple sms's in my new iphone 6 ios 8 version. Please help

Hello melseq,

I'm sorry to hear you are having issues with your new iPhone 6. If you are having issues deleting individual messages or conversations, you may want to double-check that you are following the process outlined in the following article:

How do I delete a message?

1. To delete a message, tap and hold the message bubble, then tap More.
2. Tap Delete All to delete all the messages. Or tap to select the messages you want to delete, then tap .

After you delete a message, you can recover it only by restoring from a backup.

 

How do I delete an entire conversation?

Open the list of conversations. Then swipe from right to left on the conversation you want to delete.

You can also tap Edit and then tap :

After you delete a conversation, you can recover it only by restoring from a backup.

Send messages with your iPhone, iPad, or iPod touch - Apple Support

Sincerely,

- Brenden