IPHONE 5 - what are/will be the basic problems occur with iPhone-5 in INDIA?

Understand my question -
i want to buy iphone 5, i from India, i live in small city, i want to know what basic problem can i occur using iphone like-
1. Good buy to unlimited data (true?)
2.postpaid sim support Wi-Fi on 3g (i read somewhere)
3.can't use siri? (is that true)
4.can't use find my iphone service?

please tell me if you or your friend had iphone which problems she/he saw.
also don't advice me to buy Android phone.
5.

Added (1). Can i use prepaid sim without any prob
and 2G also?

If You Lives in Small City Must Know These Things Before Buying An Iphone: -
1.It Supports Only Micro-SIM (Not a Standard Sim)
2. Only Supports 3G SIM Cards not 2G
3. Postpaid SIM are Working
4. If Wi-Fi is Available in Your Area its Definitely Works and its Really Fast
5. If Your Phone Got Damaged then Only Repaired By Apple's Authorised Resellers
6. Bluetooth Supports Only Iphone-2Iphone and You Need to Install an App to use the Bluetooth with Other Brands mobile
So i think you don't have any problem with this.
You Can Buy it and Use it Without Any Problem and its the Best Phone for Everyone who can afford it.

In india all places not cover by 3g network and gps also not coverd fully and all network doesn't support mini sim. Iphone doesn't have service centers in all places.

I'm using one so to answer your question

1. You can use your iphone to create hotspot and use it's data connection on your other Wi-Fi enabled devices, so if you are having unlimited data plan you can screw the mobile company

2.Wi-Fi and 3g are two different things Wi-Fi is the network created by internet router ( iphone can be used as internet router for creating Wi-Fi ), 3G is the internet you can use on sim card provided by the mobile company.both prepaid and post paid sim card have facility of 3g on them.

3.can't use siri, it's not absolutely true, to use siri you should be connected to the internet either through Wi-Fi or through 3G, secondly the english accent of we indians is different as the siri understands US accent, so if you know american accent then siri can do wonders.

4. IIm using find my iphone service myself, and i live in delhi, you only have to create an account on i cloud which is free of cost.

i'm not advising you to buy any android phone but i had used iphone 4, iphone 4s and i'm currently using iphone 5 and samsung s3, and must tell you s3 is nowhere less than iphone rather there are some better apps in s3 which are not available on apple, and the biggest drawback of iphone is lacking of bluetooth and there's no software through which you can share your data between iphone and other android phones