iPhone 3G Facebook Problem

i running 3.1.3 on 16gb iphone 3g used have 4.2.1 downgraded obvious reasons. problem when try facebook doesn't let me cause nee 4.0 or higher. tried spoofing firmware when try install facebook app app store never works goes free after clicked once install. transferred lot of .ipa files via ssh installous downloads , tried installing facebook those, of them install of them crash when try open them. there solution this? thank you.

 

is hard? (bump)

 

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