Comment 21 for bug 1946096

By investigating the mentioned patches directly, the existing behavior should not be changed:

* The patch for Quectel EM160 4G
  There is only one patch, all changes are for the Quectel modems.

* Patches for Foxconn T99W175
  There are 5 patches,
  (patch#1): Modify the command line tool to get additional scan report for WWAN subsystem
  (patch#2): Move methods between 2 files
  (patch#3): Add more 15 seconds wait for the firmware upgrading
  (patch#4): Rename an existed carrier mapping configuration file for Foxconn modem
  (patch#5): Add a new carrier mapping configuration file for Foxconn modem

From the code review, it's clear that changes only affect Foxconn and Quectel modems.

 As "3) Add a bunch of mappings from SIM->Carrier":

(a) The 2 modified carrier mapping config files are for Foxconn modems
(b) These 2 config files are used in the changed source file by hard coded
(c) Only matched(vendor_id, product_id) Foxconn's modem will use these 2 config files