3 ms·
An SMS is sent in the GSM SACCH (Slow Associated Control Channel), that channel is normally used for timing information (how far away the handset is from the ce
by bestham 8y ago
An SMS is sent in the GSM SACCH (Slow Associated Control Channel), that channel is normally used for timing information (how far away the handset is from the cell tower and the power control of the handset). Since SMS is not a real time application, they are virtually free. The phone will wait until it is possible to send. This and congestion on the SMSC is why SMSes sent on New Years eve often are delayed.