Hi guys, sorry have been sick badly yesterday cannot give an update. Samsung SGis checking on their end. The flip has been switched for the roll out of OTA and on their end it is indicated as open but it does not seem to be moving. Will update as soon as they get back to me with an update for the roll out.
For people flashing or plan to flash XSA, I'm suggesting against it as AUS has a very different modem setting as compared to our locally tailored one. So along with losing Samsung Pay, it will lose proper radio compatibility. Your VOLTE may or may not work
You will be lacking Cat 9 or Tri band 900, 1800 & 2600 Mhz so those on Singtel are not able to use those speeds. HSPA+ is absent on XSA FWs so you will drop straight to 3G if you cannot get 4G.
SG:
4G+ LTE Cat 9 (up to 450Mbps)
4G+ LTE FDD
[Band 1 (2100MHz)/ Band 2 (1900MHz)/ Band 3 (1800MHz)/ Band 4 (AWS)/ Band 5 (850MHz)/ Band 7 (2600MHz)/ Band 8 (900MHz)/ Band 12 (700MHz)/ Band 17 (700MHz)/ Band 18 (800MHz)/ Band 19 (800MHz)/ Band 26 (800MHz)/ Band 28 (700MHz)/
AUS:
4G FDD LTE
B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B17(700), B18(800), B19(800), B26(800), B28(700)
UPDATE: I'm told to check around an hours time