***UPDATE - 10/04/14***
Confirmed by HTC USA & UK, 1.12 most definitely does NOT have the Extreme Power Saving Mode (Which HTC Australia are so insistent that it does) 1.54 enables this mode.
As of now, HTC Australia, from what they've told me, have no idea about this 1.54 OTA, yet HTC USA & UK know all about it. Doesnt seem like much we can do as far as official updates goes, unless in the next few weeks they have an epiphany lol.
Until then, 1.54 for Aussie users will just have to be custom ROM.
***UPDATE - 09/04/14***
OK guys, I called HTC today and they've advised that the Australian Unbranded & Carrier branded M8's with software revision 1.12 SHOULD ALREADY have the Extreme Power Saving Mode and SHOULD NOT require the 1.54 OTA Update.
This is the opposite of the info I'm sure many of us have read in these forums and elsewhere online.
If you own an Australian M8 with software version 1.12 and DO NOT have the Extreme Power Saving Mode, you need to call HTC and let them know. I'm still waiting on the outcome of the info I sent them today but they seem pretty certain we don't need an update and should already have this option.
If you have an Australian M8 on either 1.12 or 1.54 software version and you DO have the Extreme Power Saving Mode, then please let us know.
So Aussies... Who's got their new HTC One M8?
I got mine today and i love it! my M7 is sat on my desk being neglected and only right it should be now i have this baby!
Anyways, I have an unbranded outright version from Harvey Norman. But i seem to be missing "Extreme Power Saving mode" and also I'm on the older 1.12 firmware with CID HTC_39. Has anybody in Australia got the 1.54 firmware OTA yet? let me know =D