IPhone 3G jail broken stuck on emergency calls only?

I got this phone yesterday and I'm trying to fix it. Second hand 3G was unlocked and restored and had Cydia installed.

Plugged in to computer using latest version of iTunes
iTunes error 2003 can't sync or update
iTunes recommends restore
Tried different USB port - starts to sync but as jail broken needs further software
Can't restore Error 1015
Dfu mode
tinyumbrella 'exit restore mode'

Phone now stuck on emergency calls only and not recognising sim

Does it Just Need unlocking now?

Mate, it's screwed

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