Security News > 2015 > July > How to use old GSM protocols/encodings to know if a user is Online on the GSM Network AKA PingSMS 2.0 (Reddit)
2015-07-27 23:18
News URL
http://www.reddit.com/r/netsec/comments/3etqvb/how_to_use_old_gsm_protocolsencodings_to_know_if/