Sometimes it's useful to take a shot of your iPhone screen (e.g., to help with troubleshooting). It's easy:
Simultaneously hold down the Home and Sleep/Wake buttons, then release them together. You'll hear the same shutter snap sound the iPhone makes when you use the built-in camera to take a photo, and you'll find the snapshot in the Photos app — in the Camera Roll.
Tap Select, and then tap the screenshot you'd like to share.
Tap the Share icon and then the Mail icon to email the screenshot.
You can simply email it to firstname.lastname@example.org. Or reply to an email from Talkler Help, and attach the screenshot to the email before sending.