Why does my Samsung Galaxy S5 mini keep converting sms to mms?

[AC Question]

Samsung Galaxy s5mini keeps converting sms to mms

Samsung Galaxy s5mini keeps converting sms to mms when I am typing a long text msg is there any way I can prevent this from happening?

 

[Golfdriver97]

Re: Samsung Galaxy s5mini keeps converting sms to mms

Welcome to the forums. Once a text gets long enough (over 140 characters as I recall), it has to be sent over as data. You can break up the messages, or try to figure out where you can save on characters.

 

[Km Mills]

Pictures and voice messages gets converted to mms and would not send

 

[lbandrew]

Related issue is that I keep getting SMSs as MMS and it won't download them. These are not lengthy messages. It does not happen when I send a message to myself or get one from someone else on TMobile.
I also get a large volume of SMSs from my state dept of Transport on traffic and there seems to be no problem with these no matter how long. Have deleted them all and cleared my cache.
Any advice?