Have you recently bought an iPhone 4? Having problems with the signal or the proximity sensor?

The proximity sensor and external antennas are the main problems of the iPhone 4 terminal, millions of people face them in the daily use of the terminal. The problem with the proximity sensor is not so common, and iOS 4.2.1 seems to have solved the problem for many users, but I am curious if the terminals recently purchased from Vodafone/Cosmote have this problem or it was solved by Apple.

The problem with the terminal's antennas is quite simple, because they are located outside, they are "vulnerable" to touch, that is, when you cover the lower left part of the terminal with your hand/finger, you will notice that the signal decreases. This problem mainly manifests itself when you are connected to a 3G network, on EDGE/GPRS there are extremely small chances of encountering it, so if you test, please do it when you are connected to a 3G network.

So, did you purchase an iPhone 4 from Cosmote/Germanos? Have you encountered any of the problems listed above? If possible, I would also like to see a video clip in which you demonstrate that the problem does not occur.