At the moment, the smallest smartphone is the smartphone world is LONG-CZ, this device is 68 mm long and 23millimeters wide. Being the smallest smartphone, this device is becoming a trend in some countries prisoners.
The good thing about this device is its design made up of plastic which can’t be detected hence make it difficult to be detected by metal detectors. As per latest reports from the UK, this device is extremely popular among the UK prisoners. The device costs only $30. Thanks to its small size, these smartphones are extremely easy portable.