True++ there are at least 4-5 OSes on Qualcomm with direct access to the Internet:

1. Linux Kernel / Android OS, running on main ARM CPU in "normal mode"

2. QSEE or Trustonic OS, running on main ARM CPU in "trusted execution environment" mode, in parallel with "normal mode"

3. OKL4 / REX Kernel + AMSS OS, running on the baseband CPU (modem)

4. SIM card processor, although it is very limited (typically 32k RAM) and acts only as a MITM for SMS's, not cellular data

5. The OS running on the Wi-Fi card