Why has my Galaxy s5 been terrible since the AT&T Update?

[AC Question]

Hi guys,

I purchased a Galaxy S5 sometime in November. The phone is in great condition. Its never been dropped, no water damage etc. I hadn't had a problem with it until the most recent software update about 3 weeks ago. Since then, the home button hasn't been nearly as responsive. Sometimes I won't receive text messages until hours later. And now today most recently, every contact I try and send a text to comes back with a "111 invalid number" message. Anyone been having the same problem? Or can anyone offer any advice. Thanks a lot.

 

[Zahraa Alfashkhi]

I'm having the exact same problem!! It just started this morning, and it's honestly really irritating. I loved my phone till just recently. And I'm with AT&T as well

 

[Tony Parsio]

I'm having same issue on my s5 active, texts come in and I can't reply to that same number due to it having +11 in front of the number, have to go into a old conversaton with that person