On my AT&T Note all that I needed to do was to go to - Settings/Data Usage and turn "Mobile data" to "OFF", that turned off 4G for me.
Barely pop out SIM card with out taking out battery
Open up phone
Dial *#2263#
Select WCDMA all
Pop sim card in
Hold power button down
Hit restart
This will put u on HSPA+
If u want edge select GSM
To revert back to normal select Automatic
And for all lte select lte
You must always select all bands