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+LNA3 firmware/SIM switching instructions
+
+To automatically set the APN, bring up the system
+with the desired SIM installed (AT&T or Verizon).
+
+Execute with a Verizon SIM installed
+(switch to Verizon Firmware and Chat):
+
+root@mtcap:~# /usr/sbin/mlinux-switch-apn
+Cellular radio is ready.
+Setting chat script to /etc/ppp/peers/lna3_chat_vz
+
+root@mtcap:~# ls -ld /etc/ppp/peers/lna3_chat
+lrwxrwxrwx    1 root     root            27 Aug 31 16:30 /etc/ppp/peers/lna3_chat -> /etc/ppp/peers/lna3_chat_vz
+
+root@mtcap:~# radio-query --active-firmware
+1
+
+Firmware image 1 is Verizon, and lna3_chat should point at the Verizon chat scripts lna3_chat_vz.
+
+To switch to an AT&T SIM (the default):
+
+root@mtcap:~# mlinux-switch-apn
+Cellular radio is ready.
+Setting chat script to /etc/ppp/peers/lna3_chat_non_vz
+
+It is critical that you do not use an AT&T chat script with a Verizon SIM,
+because it will set the wrong APN, and it will be remembered as belonging
+to the SIM/device combination.
+
+
+The following are not recommended:
+To manually set the chat script:
+
+mlinux-switch-apn [0|1]
+
+To manually switch the firmware setting:
+mlinux-switch-cell-fw [0|1|-1] [timeout]
+
+This command sets the chat to this readme file.  Then it will be needed to
+set the symlink for the chat script, which can be done by using mlinux-switch-apn
+with 0 for AT&T, and 1 for Verizon.
+
+
+
+
+
+
+Put the desired SIM into the device.
+
+The default APN is "phone" for the LNA3.
+
+Set the APN using:
+
+kkk  # mlinux-set-apn "YOURAPN"
+
+Do not put a "AT+CGDCONT" in the lna3_chat_vz script.  It will cause trouble.
+
+To pick a firmware based on the
+
+To switch to the Verizon firmware and chat script:
+
+  # mlinux-switch-cell-fw 1
+
+To switch to the non-Verizon firmware and chat script:
+
+  # mlinux-switch-cell-fw 0
+
+Verizon provided APN setting over the air.  If you set the APN on a Verizon SIM,
+and they push a new APN, you will need to change the APN on the device.
+
+It is best not to set the APN.  To switch from a manually set APN or incorrect APN
+to letting Verizon set the APN, remove the SIM, and put it in another device.
+Then register with the Verizon network.  With the APN setting removed, put the SIM
+back into this device.