iphone 6plus doesn't receive regular sms txt message????
it just happened 2 days ago when my friend texted me from morning but I didn't get the message until late of that day. At first I thought it might be I left the phone on for many days without completely turning it off, so I tried to power off, left it there for like 30 minutes then turned on again. Then on the next day, it happened again. I tried to reboot, turn off imessage,etc, but nothing seemed to work. I used my friend's phone to send message to my phone but didn't receive anything. And now my friend's phone (iphone 5 or 5s) has the same problem. Please help me, I really don't want to restore my phone cause i'm gonna lose all messages.
iPhone 6 Plus, iOS 9.0.2