My S4120R is always plugged in and I've forced daily calls for the past couple of weeks.
It has no trouble making "successful" calls every time.
It never got 6.3f (as most posters have reported their Samsungs never did) and it has yet to get 6.4a.
I haven't seen a single poster, here or elsewhere, report 6.4a on a Samsung yet.
There is clealry an issue.
My R-10 installed it, with just its regular phone call, already.
Both units are stock and unhacked.
Mine is connected as well and I have forced several calls.
I never received 6.3f as well and have the reboot issue and want it fixed.
What is up with DirecTV and Samsung TiVO owners?
DirecTV if you are listening please give us Samsung TiVO owners 6.4a?