In 2021, attractive phones such as the Galaxy S21 series, Google Pixel 6, Xiaomi May 11, Samsung clamshell phones and the OnePlus 9 series arrived. In the meantime, according to some rumors, we were expecting a number of phones that did not make it to the market, and others, as usual, should have been released this year, but this did not happen. In the following, we will deal with important phones that were not introduced in 2021.