i will tell u the best plan to get with iPhone..
u can take a mobile Boradband SIM card for 1 time fee of QR.100 QRs & monthly rent of QRs.200 with 3GB download a month
Rates:
http://www.qtel.com.qa/Mob_BrdbandPost_Sub.do
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& also on the same SIM card subscribe in Shahary (post paid service) for like QRs.130 a months or QRs.200 or whatever u like.
Rates here:
http://www.qtel.com.qa/ParentProdSrvcesLinks.do?idnum=9&prodtype=1

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now u can use 3G to check emails, browse, play games & use the entire functions of an iPhone 3G..
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fyi, the 3G broadband internet is damn fast..