Well buddy for this camilo del sol, I am like you a worker of etecsa in cfgos, esp. prince technological facilities, but in my spare hours I repair cordless phones, once you answered me a question launched by me and now I want to answer yours, well check if there is sulfate under the display on the board, because that makes the pins of power will be given to you and the radio chip does not receive all the power it needs, if you follow the power track after the 330 microfarad filter it takes you to leg 32 of that chip and from there on the other side of the board it takes you that same power to legs 15 and 17 of the chip, but you have those three power supplies the phone does not identify you with the base of it. by Facebook my workshop partner sent you our phone number, please contact us. Thank you.