it doesnt always say m33 update.it depends on how the theme was written,if your using cxmb and stuff.some still say network update.no the true way to tell is hold r trigger upon bootup.go to configuration in recovery and make sure m33 update is enabled.if it is,then the network update will work for m33.on the custom firmwares that options usually auto turned on however.if you have 3.71 you dont have the m33 update server however.same with lower ones