[Q] Carrier network problem

Greetings to you all, I'm new here and a have a question for you guys.

I have bought an second hand phone and I can't unblock it to my carrier network(Orange Romania). The phone is from UK.
I know how to turn off the S-on thing ,change the recovery mode, use fastboot, use de adb sideload, update the version of radio,baseband and so on.
The information on my phone are:
C:\Android\sdk\platform-tools>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.56.0000
(bootloader) version-baseband: 4A.23.3263.28
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.19.401.9
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) serialno: SH356W900833
(bootloader) imei: 354436056201518
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0710000
(bootloader) cidnum: H3G__106
(bootloader) battery-status: good
(bootloader) battery-voltage: 3844mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-4dab9d12
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
Currently, I don't have any ROM running on it.
Can someone tell me which files to download and what to do for my phone work? I installed ROMs like Elegancia,OrDroid,Viper(Some of this ROM's didin't event start..) and all gave me the same error "process com.htc.htcdialer isn't responding". I have searched all over the web... couldn't find anything(the solutions I have found didn't worked)
Any ideas guys? Thank you