Who can recommend me kindly? I received these days a Chinese i9300 Android 4.8 display "single SIM. Operation-download applications, GPS, video and display-all OK according to my needs. Primary drawback is the difficult and intermittent signal reception UMTS 3 Italy, the operator with which I have no problems in any situation with the smartphone Nokia Xpress Music 5300. I think it can be resolved by updating the modem but I could not do. I downloaded and unzipped the file and Odin3_v3.04 modem_I9300NEDLI1_TRE PC. I connected the 'i9300 confirmed via USB mass storage as required (but I tried also with only the download folder open without confirming the mass memory) and Odin open on your PC. In the phone menu I loaded the modem.bin as above and press Start. Nothing seems to have happened. Odin appears on the screen: <OSM> all threads completed. (succeed 0 / failed 0), that is, it seems to me that Odin PC does not see the phone for which data are: GT-i9300 Android version 4.1.9 Baseband version MAUI.11AMD.W11.50.SP.V20 2012/08/13 14:56 Kernel Version 3013 1211 V58 Wed.Jan 2 16:36:33 CST 2013 Build Number IMM76D.GT-I9300ZSALE9 Customized version buil 1357097495 My questions are for you practical and leading experts: 1 - To improve reception 3 Italy is my interpretation correct proceed to upgrade the modem and the files I have downloaded are the right ones? Only the modem.bin as I have done or do I recover the file system full? 2 - How exactly do point to point connection between PC and Smartphone? I will be much obliged response even if the possible negative impossibility of development. Thank you all.