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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
To get an in-depth look at the new iPhone coming out in Oct. you can watch the presentation. It will be Oct. 4th at 10 AM Pacific Time. Apple will show all the new bells and whistles then.
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"It's not the dress that makes you look fat. It's the fat that makes you look fat." - Al Bundy
"can an ipad be used as a phone too..." - no (except possibly by using skype or similar internet phone technology).
Special features? Not many these days that can't be found on many other smart phones. iphones use a closed, proprietary operating system, while many, if not most other smart phones use Android.
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"Love justice, you who rule the world" - Dante Alighieri
(1.This form of addrress is acceptable, not the way you have used 'dear'.
2.Use of sms type of language is not acceptable here.
Just giving some ground rules as you are new to CR4)
All three products are made by the Apple Computer Company, which has an excellent website. Here you can see many pictures, videos and specifications etc, which will answer any questions you have. Since you know enough to visit CR4, you can as well visit http://www.apple.com/
There are also Apple stores (Imagine Stores. Also Croma) which you can visit and handle these products.
They are awesome. But expensive.
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Nothing worthwhile can ever be taught, it can only be learnt.