any one plse give link for downloading 4.3 firmware for c1904 xperia m....!! I tried hard...downloaded abt 2gb files...flashed some, still on 4.1.2..!!!! sometimes instead of ftf got zip file...:( plse help....i m from india..
Flash with Flashtool. Before flashing, backup your datas and then shut down your phone. Ready the ftf file to flash then connect your phone using USB to computer while holding volume down until you see a blink in the LED stripe of your phone. Then the file should be flashing properly.
It'll work, C1904 have different 3G frequency as compared to C1905. They both are single sim so it should work. You can even flash dual sim version of Xperia M so this shouldn't be much of a problem. Probably the only problem u will face is fast battery drain when using 3g or something else related to 3g.