I have an iPhone 5s currently running iOS 10.2, and I keep iMessages OFF at all times. Over the past two months it felt like I wasn't receiving all my text messages, but I blamed it on my carrier (Verizon, lol). All of my texts were being sent & received (SMS to iMessage), but it receiving them seemed problematic (iMessage to SMS). Today, I logged into Messages on my mbp for the first time in over a year -- and was greeted with roughly one hundred messages, only half of which had been received as SMS/pushed to my phone. The earliest message was dated from mid-December which is when I first started to suspect an issue. I've logged out of iCloud and my Apple ID on my phone and on my mbp, made sure iMessage was inactive and logged off in Messages, unchecked my telephone number under Messages preferences, logged into and then logged out of iMessages on my phone, double checked that roaming & data is allowed for SMS & Messages, and restarted everything. Is there anything else I can do to make sure that iMessages from other devices are delivered to my phone as SMS? Also, incredibly confused as to why most of these texts were not delivered via SMS even though they were sent to my phone # when iMessages was OFF on my phone, and I when was logged out of both iMessages and Messages on my laptop. And why this spontaneously started in December -- the only thing I can think is that I upgraded the iOS then, but it seems like that shouldn't affect the receiving of SMS texts.