iPhone 13 pictures will not deliver to whoever I am texting

Re: "My iPhone 13 will not send pictures anymore".

You must be missing that!

You might want to check if apple's latest "sharing" method works for you:

Between Apple devices, iMessages can send pictures over wi-fi

For iiOS27: See how to: Share content in Messages on iPhone - Apple Support

Eg: says:

"Share content with others

1. Go to the Messages app  on your iPhone.
2. In a conversation, do one of the following:

• Copy and paste an image or a link into the text field.
• Tap (the + icon), tap Photos to browse recent photos and videos, then tap to add.
• Tap a message attachment, tap , then tap a contact or (the green iMessage icon).
  • Tip: When you tap , you can also copy, save, or print your attachment.

3.Add a message (optional), then tap (the blue icon with up arrow ... to send).

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Re: "If I send a picture in text then it states not delivered. I believe this started happening with the last update.

For SMS, MMS: cellular data is required for sending pictures to non-Apple devices.

Sending and receiving pictures depends more on:

• what your cellular-data plan allows,
• your settings, and privacy permissions, for Messages,
• and your provider's services (charges may or may not apply)

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Re: "I have tried all apple suggestions but it did not work".

We can not guess what you have (or have not) actually tried, (or perhaps, overlooked).

Eg: View or change cellular data settings on iPhone - Apple Support

Says:

1. "Go to the Settings app on your iPhone.
2. Tap Cellular, then" (check whether or not Messages app is turned on.)

• • "Turn cellular data on or off for an app or service: Scroll down to the list of apps and services, then turn an app or service on or off. When cellular data is off for an app, iPhone uses only Wi-Fi for that service.

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Check if there are ScreenTime restrictions set:

Eg: Settings > ScreenTime > Restrictions > Mobile data (can be allowed or not)

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If you have VPN (ie: one not provided by an employer) installed, it could be causing interference:

See: If your device has network connectivity issues, check for VPN and other third-party security software - Apple Support

Else: Contacting your provider may help restore order :-)