Using 0000 to pair up the w376g with a vehicle
Your successful pairing is one of several that have been offered up in the forums and it reflects the erratic nature of the Tracfone BT implementation. Others may have a better technical orientation on this and I hope we hear from them, but I believe that it would serve most users well it they assumed the default w376g BT passkey is '0000' and that it has no relationship with the SIM Pin.
Tracfone doesn't have a systematic data-supported technical support process and will typically provide packaged answers, answers probably provided by mgrs in proddev and mktg. If you attempt to change the SIM Pin code and fail to accurately enter the default code it will eventually come up with the 'Enter SIM PUK' code which is Tracfone's way of telling you to call them and have them assist you in resetting the SIM Pin code. CSRs at Tracfone, as a matter of routine, tell customers to enter the code of '1111' as the SIM Pin. The SIM Pin2 code is probably '2222', if true then it should be easier to remember the codes for SIM Pins 1 and 2.
As much as I would like to accept the SIM Pin of '1111' as the 'magic bullet' it doesn't mesh with general bluetooth implementation of the w376g. Granted, my orientation with a 2008 Prius and the experience of many others with different car systems doesn't guarantee 100% accuracy of the assertion that the code of '0000' is the default BT passkey. It does indicate that the w376g is erractic in its BT implementation and acts illogically in many cases, depending on the car's BT implementation. The '0000' code works if you can initially establish a passkey change to '0000' on the car's BT or if you can establish a connection with another cellphone that has a more elegant BT implementation allowing for car BT passkey changing after deleting the first successful connection.
I tested a SIM Pin of '1111' on the w376g with a passkey of '1111' on the 2008 Prius and it failed to pair; the '0000' remained necessary in order to initially pair the devices. I first deleted all references to BT connections in the w376g and cleared the car's bluetooth of connections and set it to the default state, which establishes a default passkey of '1111'. After the initial pairing with the '0000' passkey I was able subsequently pair the devices with a code of '1111', but it required a messy process that is not easy to describe. The w376g is not an easy device to use with BT if you want the same flexibility that other cellphone users have; however, it does the job as a BT phone and it is good value.
Various car BT implementations will react differently with the w376g with many considerations involved, i.e. ability to disable 'auto connect' at the time of initial pairing, BT handshaking, navigation/non-navigation, etc.
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