Iphone 4 is a very good device and a lot of people would like to buy it, only it is, alas, not cheap.
And if you look at it, the differences from the iPod Touch 4 are minimal (from the iron to the iPod Touch 4 there is no GSM module, GPS, and a little worse camera).
Resourceful Chinese entrepreneur from the company Yosion decided to take advantage of this and invented an excellent device-case that turns the iPod Touch ... practically into a full iphone. The first case called Apple Peel 520 was released a year ago and allowed to turn the player into a full-fledged GSM dialer (alas, but GPRS support was not implemented in it). Prices for this wonderful creation of Chinese masters start at $ 61 and can be bought in popular Chinese stores or on ebay. ')
A year has passed, the Chinese decided to correct this annoying fact and released an upgrade of the case .
Fully changed the case material (now the case is not so much like a garage hack as the previous version), installed a GSM module from another manufacturer, added GPRS support (it’s still unknown about 3G support) and raised the price a bit ($ 83).
Now, anyone who wanted to buy an Iphone 4, but was unable to do so due to lack of funds, can get a device that is very similar in functionality for only 230 (cost of iPod Touch 4 8Gb) +83 (cost of the cover that plays the player into the phone) dollars.
For those interested in video on YouTube with an overview of this wonderful gadget.
UPD. If someone from a respected community has such a gadget, it would be interesting to listen to his impressions of use.