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Sylvain Munaut 246tnt at gmail.comHi, > I wish to develop a API which can configure my phone by inserting these > values , but I'm running short on programming skills, Well you may want to learn to program first. (I don't mean to sound harsh, but please, _do_ learn the basics first !) Then learn about how the phone itself works by reading the code, and then try to hack it to do your bidding. > by doing this i will have fully configurable radio around 35 KM range . with > amassing prince only @ $5 - 8 You're a little optimistic. 35km range works because one of the side (the BTS) is high up above the ground and has a huge antenna. When both sides are close to the ground with essentially 0dB antenna, it's not gonna be so great. Also, your radio won't work where there is no common cell phone coverage at both location. For this application you need clock sync between the two mobile. You're also gonna need to remove the RX filters on one of the phone to RX in the uplink band. So you need precise soldering skills. (believe me, I've done it :) Alternatively you could TX in the downlink band, which require no soldering and doesn't even involve out of spec tuning since PCS1900 uplin covers part of DCS1800 downlink. > also which all resistors need to manipulate to do manual configuration resistors ? GSM are a little more modern than that ... they don't have tuning potentiometers ... They use a VXCO controlled by a DAC and a PLL to select the frequency. > i think Mr. Spaar have test code which just fix to a AFRCN and TS , so if We all have test code to do various stuff, but it's often hacked up together on the moment we need it and we don't necessarily keep it around. Tuning to a specific channel is pretty easy. And it's far from all that needed to turn a GSM into a two way radio. Cheers, Sylvain PS: Could you try not to send your messages twice ?