How come I can't send group texts from an iPhone to Andriod?

I have an iPhone. I used to be able to send a group text to 2 other people (one has an iphone and one has an andriod). But suddenly today, I got a "not delivered" error. I'm still able to send non-group texts to andriod users and group texts to only iPhone users. I'm just getting an "not delivered" error if an andriod user is a part of the group text. I check my settings and I do have group messaging on. I have enough space on my phone.

Does anyone know how I can fix this?

How to discreetly turn off location on iPhone?

I'm currently sharing my location with someone on my iPhone… If I stop sharing it with them will they be notified? I just wanna do it for a few hours and then turn it back on but I don't want them to know. Or will turning off my cellular data block them from seeing my location?

WHAT's WRONG WITH VERIZON FOR IPHONES? Any one else having the issue of it saying no service? Keeps going in and out for no reason

SO ANNOYING IT DOES THIS LIKE 20 times a day! IT DID THIS WHEN I HAD A SCHEDULED INTERVIEW OVER THE PHONE AND THEY TRIED CALLING AND LEFT A VOICE MAIL AND I HAD TO RESCHEDULE. WHY IS THIS HAPPENING?! I had this issue last year on my iPhone 5s and it was happening again like a week ago. I put the SIM card into my 6plus and sure enough. SAME THING. I'm GONNA STICK MY FOOT UP VERIZONS *** AND MAKE THEM LICK THE POOP OFF MY TOES!