[JustMcKay]

I have issues sending text messages to certain Android devices.

How's that? Is the problem on my end, with my carrier?

[Just_Me_D]

You shouldn't have a problem sending SMS messages to any smartphone as long as you and the recipient(s) have a cellular plan that allows for it. Also, are you certain the recipients haven't placed you on their blocked list?

[JustMcKay]

I definitely am. For example: My sister had an iPhone and got the LG G6 and I'm unable to text her since.

[doogald]

Well, one thought is that if the recipient ever had an iPhone (or any iOS device signed in to iMessage), your phone is sending iMessages to them rather than SMS messages. Since your phone tries to send an iMessage to a recipient first, if the recipient never signs out of iMessage on an old iPhone they may never receive your message. You can have the recipient(s) with the Android phone try to unenroll from iMessage.

See https://support.apple.com/en-us/HT203042

[JustMcKay]

Thanks for that! While on Apple Support website, I found a similar issue and it was so simple to solve!! In Messages, there's a setting called Send as SMS. It was turned off.. I just tried texting my sister again and it works

[Brian W1]

I have had this happen to me. I had to contact Apple to fix it. What happened to me was, I switched iPhones and didn't turn off IMessage on my old one before I reset it to sell it.