Hey guys I just got a friends number and when I texted them I got a message saying "+1121611611 Error invalid number Please re-send using a valid 10 digit mobile number or valid 10 digit short code" I know I have their number entered correctly as I have checked with multiple people. I am using Straight Talk as my carrier and my phone is an ASUS Zenfone 2 Laser. I have never switched carriers. Any ideas are welcome because I really dont know what to do. As of writing this I noticed I can send them texts, they just cant respond. We managed to get one message to go through to me, ut that was it. Never had this issue with anyone before. I assume my friend is having the same error message and they are on an Iphone.