Upgrading firmware

[SudeepShakya]

I am upgrading to version 4.3 from mobile not from PC companion, so before upgrading what stuff is needed to do ??

Will it erase all my setting, data, downloaded apps, APN, MMS, SMS, phone number,..etc ?? My download is reaching almost 90%.

[him]

I don't know about ota as I've updated my phone via pcc.