I haven't been able to send SMS messages (receiving has been possible however) for quite some time. I have set up my carriers APNs as I thought that may be the problem however I still cannot send SMS messages.
You need to contact your carrier... SMS should work regardless of APN (MMS requires the APN be correct). If you can make a phone call, basic texting should work as well, there is no setting on your end for it.
I am not familiar with the error your mentioning. Maybe you could screenshot it and tell us what causes it to occur, when it occurs, etc?
I was planning on contacting my carrier. It occurs whenever I try to send an SMS. Every time. I however, can receive them, use 4G, HSPA, etc and make calls correctly.
I am still yet to contact my carrier but Google doesn't bring any errors like mine. I see -1 and 28, but 10? Never shows up. (Sorry for the double post)