My home phone number I would like accessible in a different town

This isn't AT&T support, this is a customer-based help forum. There is no way to move a landline number from one location to another that's not in the same area code and nxx. You say your number was moved to a sim card, that's cell service, which is the only way you're going to be able to keep your number. If you have a good cell phone signal in College Station, look into a wireless home phone, there's several that have standalone wireless home phones, with AT&T you'd also have to get their internet to get a wireless home phone. You'd plug your cordless phone system into the wireless home phone and from my experience the voice quality is very good, the main thing you need is a good cell phone signal. 

Hello @Texan4ever,

Thank you for contacting us. Let’s make up for the invested time and get the help you need!

We'll be glad to provide you with the most necessary details:

"Yes" landline numbers can be ported to wireless, but not all numbers!

 We recommend that you visit the article as it clearly discusses on how to Move Your Service to a New Address and also to Change your Home phone number

We hope this information is helpful and thanks for reaching out to AT&T Community Forums!

Leon, AT&T Community Forum Specialist

A VOIP provider other than AT&T can most likely let you have a cordless phone connected to their VOIP terminal.  Otherwise, you'll be stuck with whatever AT&T Wireless service that SIM card is enabled on and at some point when you need to change your service they'll say "you don't live in that service area any more so we can't do whatever-it-is-you-want until you change the number to a local one."   

VOIP services like Ooma, Vonnage, and MagicJack can all let you port a number to their service regardless of your actual location.  

It’s not really clear what you are wanting to do.  By “cordless” are you referring to CELL PHONE service (ie Wireless)?

For clarity:

Cordless refers to a type of home phone that uses a base unit and CORDLESS handsets.

Wireless refers to cellphone service

POTS stands for Plain Old Telephone Service also referred to as Analog. This is the original phone service aka landline, aka home number.

VOIP stands for Voice Over Internet Protocol.  While it is considered a landline, it uses the Internet for service.

Landline service requires the use LOCAL area codes.  If your “long time phone number” got moved to a SIM card, that’s a cellphone (wireless) number, not a “home number” and is never going to work with a phone wired into your house.

Since the OP hasn't responded or asked questions of the services, I assume they've found a way to port the number to one of the services mentioned. Seems like we get a lot of questions and the topic starters never responded, so we can only guess if the problems have been resolved. In this case, it doesn't seem the OP knew what service their number was ported to. 

"Texan4ever"  here: thanks for your responses. I will look in to every possibility 🤦🏻‍♀️ even though it doesn't look possible. No i don't want a cellular home phone. A cordless phone that has a base and can be the old school land line or used with a cloud based or digital technology service. I am told land lines that originally had wires into homes don't  work in that way these days..fiber optics they say is the way now. The cordless phone I refer to says it can use digital technology. The last provider did operate the home phone via a "cloud" service. It seems behind the times  to me that we can keep our cell numbers regardless of the service provider but we can't move a home phone number. 🤷 Obviously some education in technology advancements are needed by me! I apologize for my ignorance in these areas but I can only learn by asking... and I do love to learn! I am not sure why i am so adamant about trying to keep the number! Which  leads me to another question: if the number won't work how does changing the number allow use of a "land line" telephone?. 

You can plug your cordless phone base into any of the suggestions given. You most likely can port (move) your phone number to any of the suggestions given, you'd have to check with the service to see.