I also saw this, but don't understand what it means:
A SIM (Subscriber Identity Module) card is just a tiny memory card that it's sole purpose is to store your account information, such as your phone or network plan. All cell phones require them.
Now to answer your original question, I think you would be better of with a low cost phone, you may be able to get one for free is you are on SS Retirement, Disability or SSI, plus a few other programs like Food Stamps, etc. The reason I say that is I had an AT&T GoPhone and supposedly had a 10¢ a minute plan. I usually paid $25 every three months, and if you have money left over when you had to pay them again and IF you paid them before your three months ran out you could keep the extra money, up to $500. My Wife forgot to pay the bill when we had $455 balance and we lost it.
But the primary reason I don't like pre-paid phones is I had over $50 balance on my phone when I woke up in the hospital in 2023. Thinking that the plan was still the same 10¢ a minute plan, I called my daughter to help her get things in our house moved. (The contents, not the house...) I was on the phone with her for two hours. At 10¢ a minute plan, that would have been $12. But the next time I went to call her it said the balance was 25¢. AT&T had changed the plan to 35¢ and had not notified me. The phones were in Cindy's name and they sent a notice to her in email, but she had passed away two months before.
I had no wallet, no credit cards, no money, no other phone, and no way to pay my bills, etc., as I did all that on my PC, which was at home in Eureka. I was in Sabastopol, about 45 north of San Francisco. I had plenty of money, but I had no access to it. After my daughter tried to call me several times and got the "The person you are calling is not answering" message, she called the hospital. They transferred the call to my room, but I couldn't reach the phone since I was effectively tied to the bed with a high flow O2 tube, probe wires, and a catheter. (I couldn't get out of bed for two months, and I hated it!)
So when they left Eureka in the U-Haul with our stuff, they stopped at the hospital on the way to Bakersfield. My daughter brought me a cell phone, and said I could call anywhere in the US or Canada for free, and talk as long as I wanted to. She said she had an unused line on her phone and set it up for me.
Anyway, my point is that if you have a pre-paid phone, get it in your own name, make sure you pay the bill before your time expires. But a line of your own would be better. You should look into Lifeline service. If you qualify, you can get a cell phone for free... And ya cain't beat that price.