Galaxy S5 Sim card lock
I needed a phone that would work overseas and allow me to use SIM cards from other networks so, based on recommendations from Boost, I purchased the expensive Galaxy S5 at my Boost store. I've used the pone with Boost for 3½ years and finally need to test using it on another network.
After setup and installing the new SIM card, my phone is giving me the message "Boost Mobile | Invalid SIM Card".
Boost support told me to call Samsung tech support, and the manufacturer said that there was custom Boost software on the phone that was locking out SIM cards from other networks. So it looks like my phone is telling me the same thing: that it is locked to only use Boost SIM cards. The Boost website has an "unlocking policy" page that says essentially the same thing: that in addition to the MSL lock there is also a SIM lock.
So the device, the manufacturer, and the Boost website all agree, but whenever I call Boost support, they say there is no such thing as a SIM lock on my phone, and all they will do is give me the MSL code.
What can I do to get my phone unlocked?