crwdns2933423:0crwdne2933423:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 Majesty

crwdns2934249:0crwdne2934249:0:

this guide should help you.
http://www.ifixit.com/Guide/Device/iPhone_3G
Steps 4 through six show all three ribbon cables.
+NOTE; use the logic board repair manual, it shows all the necessary steps for disasembly.

crwdns2915684:0crwdne2915684:0:

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crwdns2934241:0crwdne2934241:0 Majesty

crwdns2934249:0crwdne2934249:0:

this guide should help you.
http://www.ifixit.com/Guide/Device/iPhone_3G

Steps 4 through six show all three ribbon cables.

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open