SMS & MMS 2020 SE

I think I stumbled on why this is happening. When I text if it's a blue bubble I'm sending via my cell service/iPhone. If it's a green bubble I'm sending through FaceTime. When trying to text, I can send attachments to anyone who is blue; I cannot send attachments to someone who is green. How or why this happens is beyond me but people in my contacts (* only when trying to text them *) they're either Green or Blue and this seems to be the reason who does and doesn't get sms/mms attachments!!

Anyone have thoughts or a reason to why this happens? I know I did not intentionally do this... it just happened!

I also have another iPhone an 6S Plus. Same issue. My carrier states, "Unlimited SMS and MMS messages are included at no extra cost." - I've removed the SIM Card, reset both network settings and erased all content and settings, watched YouTube video's, ...I'm exhausted!

Who is the service cell carrier for Qlink wireless? That my friend has been the BIG QUESTION. I found this out Q Link Wireless is contracted with T-Mobile as a Mobile Virtual Network Operator; T-Mobile has recently merged with Sprint. Called all three and that lead me back to QLink where I was put on hold and lost my connection. Hm? Called back went through their Gauntlet of "Press This/Press That" and got no where other than that someone will call me back in a day or two. I guess when your service is free because you're disabled (SSI/Medicare) ...you simply slip through the cracks. *I'm a positive person as well as determined but after weeks of trouble shooting and learning on my own - I guess I just don't send SMS/MMS texts even if they're 100% free with my service.

Addendum to my stating this was "SOLVED" I solved the why... but it wasn't the solution!! :(

This is what I tried: I deleted a few contacts and re-added them... even though I completely turned off facetime in settings... it still reverted back to facetime green! * So I am once again I'm BAFFLED!!!

Thanks KiltedTim, Waiting for a callback from QLINK. They said, "48 hours" a day ago.

While waiting maybe you can help me understand why my iphone SE 2020 with both a QLINK SIM Card and WI-FI (when texting) has changed my contacts color? I did not change them... they simply are green or blue not both. So I can send texts with pictures to the blue contacts. * these latter mentioned texts are going to their ipads (facetime?) not iphone's. ** I know... cellular data. ;-)

Rudegar, can I ask why the SMS/MMS settings wouldn't come within the new SIM Card I was sent? Qlink (my carrier/mobile network) states, "Unlimited SMS and MMS messages are included at no extra cost."