[iMore Question]

But some of my texts are green how can I get rid of the green Tex
For I find the green texts don't always go through and I press the
Retry button but it still doesn't go through how can I change over to
iMessages only

[phreddyl]

If the people you are sending the messages to are not on iPhones or iPads then it will not go through iMessage and be green

[Ledsteplin]

Blue is iMessage between iPhones/iPads. Green is when you text someone who does not have iPhone/iPad. They may use Android. Regardless, your green text should go through. You might try Reset Network Settings.
Reset Network Settings Settings>General>Reset>Tap Reset Network Settings. You may need to enter your wifi passcode back in afterwards.