3.28.401.9 is the latest most current International GSM version I believe. Go and find your Carrier in the list and find the next closest version that is available. I did this the other day with a T-Mobile Netherlands M8 and we flashed the next closest firmware version available for No Red Text and it worked just fine. I believe that it might change the phone to that version itself though, I can't remember after you run it, check your MainOS version in the Boot loader or boot into Fastboot and open a command prompt and enter fastboot devices, make sure your device serial # is listed as the response, then type fastboot getvar /all and look at the MainOS Version
Just wanted to know is it OK to use closest to mine wich is 401.7,thnx