Hello,
I have had my iPhone 5 since December 4th, but didn't really use it for texting much until this month. For the past week I have not received any texts from people not on Verizon.
In my messages settings:
iMessages is ON
Send Read Receipts is ON
Send as SMS is ON
Send & Receive is [my number]
MMS Messaging is ON
Group Messaging is ON
Show Subject feild is ON
Character Count is ON
In Settings>General>Cellular:
Cellular Data is ON
Enable LTE is ON
Roaming is ON (everything in it is ON)
Personal Hotspot is OFF
Use Cellular Data for Itunes, Facetime, Passbook Updates, and Reading List is OFF.
My iOS is 6.0.1
Thanks