TRACFONE Owned Brands
1) TRACFONE
2) NET10 WIRELESS
3) Straight Talk Wireless
4) SIMPLE Mobile
5) telcel
6) SafeLink WIRELESS
7) pageplus nationwide prepaid cellular
8) Total Wireless
All of these wireless plans/brands will work on any TRACFONE branded locked phone and any unlocked GSM phone.
TRACFONE is the top of the top and all the other brands are underneath it, so all brands under TRACFONE will work in TRACFONE branded locked phones, but TRACFONE will not work in the ones under it.
Here is a few examples:
1) A SIMPLE Mobile Service SIM card will work in a TRACFONE branded phone, BUT the TRACFONE Service SIM card will not work in a SIMPLE Mobile branded phone... even though they are technically owned by the same company.
2) A NET10 Service SIM card will work in a TRACFONE branded phone, BUT the TRACFONE Service SIM card will not work in a NET10 branded phone... even though they are technically owned by the same company.
3) A NET10 Service SIM card will NOT work in a SIMPLE Mobile branded phone, NEITHER will a SIMPLE Mobile Service SIM card work in a NET10 branded phone... even though they are technically owned by the same company.
You can use a TRACFONE/NET10 SIM Card Kit to activate service on the other brands like SIMPLE Mobile, but it will be linked to SIMPLE Mobile and can only be used in a SIMPLE Mobile branded phone, or a TRACFONE branded phone, or any unlocked GSM phone.
Example:
If you use a TRACFONE/NET10 SIM Card Kit to activate service on Straight Talk, then that SIM card will only work in a Straight Talk branded phone, or a TRACFONE branded phone, or any unlocked GSM phone. It will not work in a SIMPLE Mobile branded locked phone.
Hope this helps clear up any questions you have about your TRACFONE and TRACFONE related services and devices.
Sources: I've already done all the leg work and tested each one individually. Accurate as of 2019