Hi, all

Correct me if I am wrong, and forgive me if this topic has been covered. I searched but could not find the answer just guess....
I am with AT&T and have jailbroken 1.1.2 and considering 1.1.3 since google map seems to pinpoint the location better than find me by navizon and not to mention wiggling icons
anyway my question is:
official 1.1.3 upgrades modem firmware so that users with other carrier than AT&T cannot use 1.1.3 so new 1.1.3 jailbreak method upgrades the firmware without upgrading modem, thus you must go thru patching so that Map, Sync works after upgrading jailbroken 1.1.3. <----- Is this right?
So if I want to use Jailbroken 1.1.3 as an AT&T user or who doesn't need to unlock the phone, I need to upgrade with regular 1.1.3 to update Modem firmware, then downgrade to 1.1.1 with old firmware, ibrkr, oktoprep, upgrade to 1.1.2, then jailbroken 1.1.3. Is this right procedure to it?
I am only asking so that I can save time if there is a better way, because above method will take a while
Thanks in advance.