this is a very stupid way of jailbreaking your phone, you just upgraded your baseband which will make unlocking more difficult.
Use a hacked IPSW to jb your phone, sinfuliphone has lots of good ones. (i'm still running jb'ed 4.0)
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Hot: 2001 Estoril M Roadster
ZCP 19's michelin supersports, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt deoranged, dechromed, led tails, ZHP knob, UUC SS v3, GROM, OEM 18's w310's,
Fun: 2006 YZF-R6, black, ohlins, pazzo, cat delete, vance hines csone, YEC racing tune