Any ideas why I can't text my friend my iPhone 5s to her Samsung galaxy s4 mini? I have turned on my SMS when iMessage is in available but still nothing

Turn off imessage on your phone. Try to text again. If you still can't, try to make call to her. If she can get your call- contact your carrier to troubleshoot text messages on your or her phone. If you can't make a call, ask your friend if she will consider unblocking your phone number.

I will tell you the same, turn off your imessage and if you still can't text her contact your carrier, don't waste time here or calling Apple support.

Ask your friend if they use to have an iPhone and used iMessage. If so, they probably didn't unregister their phone number with iMessage before changing phones and your iPhone is still trying to send iMessages to their number. If that's the case, they need to contact Apple support and request that their mobile number be unregistered for iMessage.

I am having the same issue all of a sudden this week my spouse doesn't receive my texts. I have tried all the fixes and.....nothing. he went to his carrier (same one as mine) and they can't help either. I spent an hour on the apple support phone and nothing!!! ready to buy a galaxy!! I scratched my phone...all my info, started like a brand new phone....and VOILA!!!!! NOTHING!!!!!

OH! And by the way....my spouse has NEVER even used an apple product