First of all open "Phone Dialer" & Dial *#0*# -> Then Tape on Sensor. After opening Sensor section you will found All the sensors that your device support.Then just tap on Magnetic Sensor and roll your phone like the picture Below *This will improve...

Samsung delay update for Samsung A30device..First they says, update will on January!, When January arrived, they says, update will come on February. Now they silently change to March....**bleep** samsung 郎郎