Radio-messaging in two stages in wireless terminals using a radio-messaging indicator on a first channel

A method radio-messaging wireless terminals (10) in a cellular communication system, comprising: transmitting an indicator of radio messaging multibit message by a first channel of the cellular communication system during a first time slot, to instruct a handset associated to start controlling a second channel of the cellular communication system during a second time slot, wherein the second time slot is assigned to the first time slot, wherein said first time slot on the first channel is assigned to a set of wireless terminals including said wireless terminal and said second time slot on the second channel is allocated to said set of wireless terminals; encrypt a message with radio-a convolutional code messaging, wherein said first channel is less encoded than the second channel, whereby the radio-messaging message is sent; convey the message radio-messaging coded during said second time slot through said second channel, wherein said first channel is divided into time slots (30) including said first time slot, and said second channel is divided into time slots (32) including said second time slot, wherein the first time slot (30) of said first channel and the second time slot (32) of said second channel takes place in a periodically repeated manner in which the first time slot (30) of the first channel is offset in a delay before the next second time slot, so that the second time slot occurring after said first time slot of the first channel.