Unlock Codes for K550i and K850i

[senter]

hi, i´m new to this. i´m trying to debrend a sony ericsson K550i that i have. i would like to know if you could help me. when i connect it to the XS++ this is what it says:

10:36:14| Baseband ID: 9900
10:36:14| Protocol Version: 3.1
10:36:14| Warning: IMEI name does not match GDFS name (IMEI:NULL GDFS:K550)
10:36:14| ...using GDFS name
10:36:14|
10:36:14| Profiling SEMC phone...
10:36:14| Platform: DB2020
10:36:14| OTP CID: 51
10:36:14| EROM CID: 53
10:36:14| EROM Color: Red
10:36:14| IMEI: 35273302xxxxxx
10:36:14| Phone ID: K550
10:36:14| Region: EUROPE_2
10:36:14| CDA: CDA102743/1 R11A
10:36:14| Firmware Version: R6BC002
10:36:14| EROM: R3A022
10:36:14| Ready for operation!

i would like to know if i can do it for free or not.
thanks in advance

Read here: Flash K800 CID53 with K810 software CID53 (for begginers) and U=use these files:

1. K550_R6BC002_MAIN_GENERIC_LI_RED53
2. K550_R6BC002_FS_EUROPE_2_RED53
3. HB1-06_Gen_CDA102568_11_R8A_GENERIC_EUROPE_2