Why are my text messages are not sending on my Samsung S5?

[paris gosedlo]

Why are my text messages are not sending on my Samsung s5

I have unlimited text and my messages are not sending it just saying that it is failed even thou I have full signal

 

[Roman1]

Re: Why are my text messages are not sending on my Samsung s5

Are you using the default text app on the device?

 

[Gekko]

Re: Why are my text messages are not sending on my Samsung s5

I have unlimited text and my messages are not sending it just saying that it is failed even thou I have full signal

What is an APN, and how do I change it? | Android Central

 

[paris gosedlo]

Re: Why are my text messages are not sending on my Samsung s5

Yes I am