yellowsn0w State 1: 5dots

This state is the hardest to fix. You can tell you are in this state by toggling airplane mode on/off. You will see "Searching" for less than a second and then back to 5dots.

Test 1:
yellowsn0w -r
toggle airplane.
No change.
Reboot
No Change

Test 2:
yellowsn0w -r
yellowsn0w -s until successfull.
Reboot
Signal returned. Unlock successfull.

Test 3: With full signal from Test 2 above
Reboot
No signal
Toggle airplane
Back to 5dots
Running Test 2 again.

Test 4:
Airplane on
yellowsn0w -r
yellowsn0w -s
toggle off during yellowsn0w -s
"Searching"
"No service"
5dots

Test 5:
yellowsn0w -r
yellowsn0w -s
reboot
wait 60 secs
airplane on/off
"Searching"
Full signal.

Test 6:
After success from Test 5
Removed sim
reboot
reinsert sim
5dots
waiting 60 secs
toggle airplane on/off
still 5dots
Repeating Test 5.
Success

Test 7:
Rebooting after success of Test 5.
Signal does not show up straightaway.
Waiting 60 secs.
toggle airplane
5dots :(

Test 8: Restoring iphone (Drastic, yes, but required for test)
Restore to 2.2
Quickpwn
Cydia - yellowsn0w 0.9.5
Reboot with sim inserted
Toggle airplane
Full Signal+carrier
Will now reboot
No signal
Waiting 60 secs
toggle airplane mode
"Searching"
Signal found again.

Test 9:
Swapping sim cards
Rebooting
No signal
Waiting 60 secs
toggle airplane
Signal back again.

Test 10:
2 identical iphones
Both running yellowsn0w 0.9.5
Both unlocked
Rebooting both
1st iphone unlocks immediately after reboot
2nd iphone requires airplane on/off after 60 secs.
Why ?