I do and it's about to drive me crazy.
First, who makes this box? Mine says General Instruments on it, but there are posts in this forum from people saying they have a Motorola Starfone Model SFT2. Do both companies make identically named cable boxes?
Second, although there are several posts about them, there is no definitive answer about an IR blaster code works for these boxes. I've messed around with mine quite a bit and the best I can do is get about a 90-95&% success rate on channel changing. If you own one of these boxes and have an IR blaster setup which works, I would LOVE to hear about it.
Third, does it make a difference for testing channel changing if I change via the channel guide or if I type in the channel number myself? I've tried both and it doesn't seem to make a difference, but I figured I'd ask.
The weird thing about my problem is the channel changing does not fail in any consistent way. Sometimes it will drop the last digit, sometimes it seems to repeat a third digit, sometimes it seems to give the digits to the box VERY fast and the box can't deal with it, sometimes it looks like everything works, but the cable box doesn't change channels. To say it has been frustrating would be a large understatement.
I've read the FAQ concerning the IR blaster fine tuning parameters, and tried many variations. But I've not been able to do find anything which works better than 18 to 19 times out of 20.
If you don't want to know, don't ask. The truth is brutal, prepare for pain.