Unless you have access to a mobile phone's baseband source code, you cannot really trust anything about its level of security. This was discussed on HN a while

Unless you have access to a mobile phone's baseband source code, you cannot really trust anything about its level of security. This was discussed on HN a while back and comes up quite often: https://news.ycombinator.com/item?id=10905643 https://news.ycombinator.com/item?id=10905643