Android cannot receive texts from one Iphone contact

[Android Central Question]

I have an issue that has not been able to be resolved. About a month ago my iphone stopped connecting to a network, receiving calls, imessage, sms etc. I got a new phone and the issue persisted and SMS was being delivered intermittently. I changed carriers and got a new phone, number, and sim card. Problems with sms continued, found out my icloud was corrupt, and wiped my phone and made a completely new icloud. Now, I still randomly have an issue with one android user that randomly does not receive my texts. Anyone ever had this issue? I have done every type of trouble shooting there is. We were able to contact each other regularly and easily for about a month before my network issues started, as soon as they started this problem has persisted. Im looking for some out of the box ideas. I am the only contact this is happening with with them and now they are the only contact I am having issues with.

 

[ManiacJoe]

The first thing I would check is to make sure that your iMessage thinks your contact is an SMS user, not an iMessage user (blue vs green).