Broken phone, SIM OK
The chances are that the W375 is locked to Net10. The other Motorola phone you mentioned will work with the old SIM if the phone was previously used on Net10, or has been unlocked.
Most phones, upon issue, are locked to the network that provided the phone. If the other working phone is locked to a different network, speak to the Network it was previously locked to, and ask for an unlock code.
Try it anyway, you can't damage anything by doing so.
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