Here's a pretty good article on troubleshooting a traditional landline. Really this this old topic needs closed. 

Hi @BHolmes0126, we want to help you get the speeds you deserve. Our ACE @formerlyknownas gave some great advice, and we want to try troubleshooting in addition to that. To start, try resetting the network settings of your Galaxy S22 Ultra by going into the Settings > General Management > Reset > Reset Network settings > Reset settings > Reset to confirm, as this will help improve your phone's connection to the network.   We also recommend troubleshooting your phone service itself, with our wireless support page. Once you sign in, you'll recieve personalized troubleshoot steps to speed up your connection. Please share the results with us here.Dylan, AT&T Community Specialist        

We understand importance of you and your girlfriend being able to send text messages successfully via the Galaxy S22 devices, nathan82allen.   Our first recommendation would be to turn off both devices for several seconds, then turn it back on and try sending another message.   Our second recommendation would be to use this resource to troubleshoot your text messages. Scroll down to where it says, "Email and messaging", then click, "Fix message issues". Click the gray Start button to begin the resolution flow.   We also suggest that you also scroll down to the "Troubleshooting" drop-down, then select Reset Device. Just take a look at the instructional video and follow the steps to reset the device and network.   Our third recommendation would be to use this tool to find mobile messaging help. Please click the gray box that reads, "Let's Get Started" to use this next troubleshooting module.  You can also follow the below instructions:   Can't send or receive text or picture messages? Try these tips: Restart your device. Turn Wi-Fi® off. Make sure mobile (cellular) data is enabled and that you can browse the web. Then try again. Be sure messaging is on. iOS devices: Go to Settings, then Message, and turn iMessage off and back on. Android devices: Go to Settings, then Advanced Messaging, and turn Advanced Messaging off and back on. More mobile message troubleshooting tips Here are some other things to try: Check your device's memory storage. If it's full, messages may not come through. Make sure your device is updated to the latest software. Add +1 (the country code) before the 10-digit phone number for all your contacts in the U.S. This makes sure you can text them if you're out of the country. Our fourth recommendation would be to view this forums thread for more resolutions with fixing your messaging.    Please let us know this helps. If not, we can continue offering you further help. Thanks so much for reaching out to AT&T Community Forums!   Nelson, AT&T Community Specialist