[Ocsoe]

I believe they are quite a few External Keyboards that are available in the Market which You can be attached with the iPhone 4 and iPhone 4s I wonder if anyone here who has used any of those here can recommend which is the best keyboard for iPhone 4s.

Thanks in Advance !

[gogorocky]

Seems you like physical keyboard other than touch keyboard just like me, I would like to recommend Bluetooth Sliding keyboard , very easy and convenient to use, perfectly compatible the iphone 4/4s.

[WreakingHavoc]

I bought the Nuu keyboard, here's a thread that will give you some insight on BT keyboards.
http://forums.tipb.com/showthread.php?t=209046