Hello gals and guys! I am having confusion over comprehending what settings are phone specific and what are SIM based. If my device, supposedly a non-smart type GSM modem chip, has to be on 2G GSM network with Frequency band 850Mhz or 1900Mhz, can it be pre-set in SIM configuration? Or else I am missing something essential here in my view? If so a YES, I need to pre-configure the SIM for the specific device to work correctly, can I buy a programmer to play the SIM myself if not locked? Or, alternatively, can I use a smart phone to set it up, then switch it into my device? Thanks in advance for clearing my confusion. Best to all.