my O2 xda stealth...invalid or missing SIM card (I'm newbie please help)

[inuvalogic]

i've search for this problem and found nothing to solve

the problem appear when I making call to my friend..but my stealth suddenly hang up...then I turn off it by pressing power button...

but when I turn on again appear an error message "Invalid or Missing SIM Card"

I've already use my friend SIM card until 6 sim card I try
I've hard reset it, upgrade software, but no result

please help me...i dont want my lovely stealth be just ppc T_T

thanks

[inuvalogic]

any help?

first I've try xdadev_all_unlock-v1.5.exe and xdadev_all_unlock-v1.6_138.exe which can unlock SIM but it say not supported

then I try HTC_Uni_SIM_Unlock_v1 but it say not supported again

I've try DSUU.exe to upgrade it, maybe its need software upgrade, but still no result

when i think maybe it's radio problem, I try UniversalRUU with Universal_radio-1.15.00 and Universal_radio-1.18 but it say not supported again

[inuvalogic]

more than i dont know how many times I do hard reset and installing ROM

but still no result...my stealth still appear that error message

please help me....

i beg of you...