Would this work?
You can if the ST SIM has never been in a phone and that phone powered up with the SIM inside. Is there some reason you cannot wait for a free replacement SIM to be sent to you for the Net10 phone? The two nokia`s have an unlocked SIM that is unique to ST. The locked SIM`s are common to all the Trac companies, so they are interchangeable between brands. It does not make sense for you to be talking about the unlocked type SIM..
NOTE: If you attempt to activate a phone and the S/N of the SIM`s in the phone and in Trac`s computer do not match, the activation fails and the SIM is ruined.
Well here is what I would like to do. Walmart.com has the LG900g Net Bundle for $29.88. Since Straight Talk does not seem to have the LG900 for sale any longer, I wanted to buy the cheapest ST GSM phone and put that SIM in the new NET10 phone and activate it. Could this work since they are both Tracfone devices?
The 900 is available in these two ST market areas (which you could order from) but you would have to varify that T-Mobile service is satisfactory in your area, because both markets are for T-Mobile SIM`s/service. The 900 is more expensive thru ST. What is your reason for choosing the ST 30 day plans over the Net10 30 day plans?