Texting through Member Tools

I have seen the long chain about texting not working through the app due to mobile carrier limits but my problem is seperate. I have an Android phone and my carrier allows large mass texts. However, there are a large number of RS women on the group who get the messages but about 10 or so are left off every time, even though I select their names. Unsure why this is happening as I have messaged a larger group before without problem. Any ideas why certain numbers (only about 10 of 90) are left off even though I can select them individually?

I'd do a test outside of Member Tools to see what happens.

They might have blocked your number. Or perhaps you're sending a MMS message instead of SMS and they've blocked MMS or otherwise can't receive it. By chance, are they on the same network?

You'll probably have to explore different things to see what gets though and what doesn't.