The best way to turn off 4G witout a restart, and still have it off even after a phone call/txt message involves downloading and app from the PlayStore called "Restart connections"
Then open the shortcut **583385## and select CDMA only mode.
Once you've done that, open the "restart connections" app and it'll cycle through your connections and land you at 3G.
4G will remain off from then on.
NOTES: This process is less succesful the other way around. (it may work 10% of the time, but most likely will fail if you are trying to jump back from 3G to 4GLTE mode).
You may have to open the "Restart Connections" app a couple of times to get it to actually reboot your connections, depending on the 4G state.
If it still can't go through after about 3 or 4 tries, you can manually close the 4G connection using the LTE Functionality Test Shortcut, and then retry restarting all the connections using "Restart Connections"
I suspect some faulty code from Samsung may be why it's required to go through hoops at times to restart all the connections, and requiring an actual reboot to jump back on 4G 90% of the time is only reinforcing that huntch of mine...
Then open the shortcut **583385## and select CDMA only mode.
Once you've done that, open the "restart connections" app and it'll cycle through your connections and land you at 3G.
4G will remain off from then on.
NOTES: This process is less succesful the other way around. (it may work 10% of the time, but most likely will fail if you are trying to jump back from 3G to 4GLTE mode).
You may have to open the "Restart Connections" app a couple of times to get it to actually reboot your connections, depending on the 4G state.
If it still can't go through after about 3 or 4 tries, you can manually close the 4G connection using the LTE Functionality Test Shortcut, and then retry restarting all the connections using "Restart Connections"
I suspect some faulty code from Samsung may be why it's required to go through hoops at times to restart all the connections, and requiring an actual reboot to jump back on 4G 90% of the time is only reinforcing that huntch of mine...
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