After a text my iPhone makes a beep and tries to record with the mic, I already have dictation off

On an iPhone, the beep and microphone behavior you're describing is likely related to a feature called "Voice Control". This feature allows you to control your iPhone using only your voice, including sending text messages and making phone calls.

To turn off Voice Control and stop the beeping and microphone behavior you're experiencing, you can follow these steps:

1. Open the Settings app on your iPhone.
2. Tap "Accessibility" from the list of options.
3. Scroll down and tap "Voice Control".
4. Toggle the switch next to "Voice Control" to the off position.
5. If you still hear the beeping after turning off Voice Control, you may also want to turn off the "Sound and Haptics" option within the Voice Control settings menu.

Once you've turned off Voice Control and any associated sound or haptic feedback, you should no longer hear the beeping or experience the microphone behavior after sending a text message.