G920w8 europe use

Ive 920w8 ... i need to get some 3g bands to use in europe. Can i add 3g bands ... and if its possible can you tell me how

Cant flash stock firmware s6 g920w8

Listen, I have a canaidian Telus Galaxy s6 G920w8 and it wont let me flash my stock firmware. WHAT DO I DO? Here is my odin log,

<ID:0/006> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> G920W8VLU1AOCG_G920W8OYA1AOCG_G920W8VLU1AOCG_HOME. tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/006> Odin engine v(ID:3.1005)..
<ID:0/006> File analysis..
<ID:0/006> SetupConnection..
<ID:0/006> Initialzation..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> SingleDownload.
<ID:0/006> sboot.bin
<ID:0/006> NAND Write Start!!
<ID:0/006> FAIL!
<ID:0/006>
<ID:0/006> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)


I can only access download mode and nothing else, Someone please help me!
I cant flash anything? Its so messed up