How outdated SS7 can make SMS security worthless

Given the current outbreak of hacking worldwide, most of it related to outdated systems liked SS7, it makes more sense than ever to look towards more secure means of texting like Signal or Facebook’s WhatsApp for communication. And if you use two-step verification, use an authentication app instead of text message if at all possible.

Where the bank used to send SureCheck requests to your phone using USSD, and SMS before that, it now uses its app to allow you to verify transactions.