227990 ⎘
Prepayment of wireline communication systems, wireless communication systems or telephone systems; Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths Circuit arrangements
Implementation and communication methods, apparatus and system of virtual subscriber identity module
#2Signal transmission system and signal transmission method
#3Implementation and communication methods, apparatus and system of virtual subscriber identity module
#4Wireless service card having machine readable codes and device and process for use therewith
#5Wireless service card having machine readable codes and device and process for use therewith
#6Wireless service card having machine readable codes and device and process for use therewith
#7Service data transmission method, terminal and charging system, computer storage medium
#8Implementation and communication methods, apparatus and system of virtual subscriber identity module
#9Wireless service card having machine readable codes and device and process for use therewith
#10Internet of things (IoT) apparatus and method for coin operated devices
#11Method for making calling card telephone calls using a mobile telephone