New, unused tracfone or Net10 sim cards are the same.
The sims will not work without the Tracfone or Net10 firmware present on the phone.
If a phone is powered on with the new sim card in it, the sim card is then locked to that phone.
Unless things have recently changed:
Tracfone GSM phones always come with a sim. The sim serial number and the handset serial number are already tied together. There is an info card in the package with both serial numbers on it. It's a done deal. There is no mix and match with any other phones. It just gives a rejection message and you can't get past that first screen. The menu locks up.
Although the sims may be pre-registered in the system to a phone's serial number, this mostly effects the phone, not the sim (as long as it is not powered up in the handset).
A sim can be unlocked from its handset, but only CS can do that. This is necessary when changing phone numbers or changing to a different carrier. A new sim is needed for those. But the new sim becomes immediately locked again
We know this can be done because At&t or T-Mobile do it. I have never had Tracfone CS do it (they deny that it can be done).
This is old and I haven't really played with Tracfone for several years so it may differ some, but the basics are still the same.
There's no present. There's only the immediate future and the recent past. –George Carlin