ONLY the driver's door UNLOCK, 2005 Camry
 

Now that I am able to open my trunk (after getting it out of Valet Mode) thanks to this forum (specifically Joey), I am going to try my luck for my next issue/question.

For years now I have not been able to unlock all the doors at once (by pushing the unlock button on the door).
I can lock all four doors by pushing the Lock button but if I push the Unlock button, ONLY the driver's door is unlocked.
There is another problem with unlocking but I am not sure if they are related. The other problem is when I unlock the driver door from the outside, it unlocks just that one door (I think this is normal with just one turn of the key). BUT if I unlock the passenger front door (with just one turn of the key), it unlocks both the passenger front door AND the driver door.

Anyway, while preparing to ask this question, I found some web pages stating that it is common problem. (And I had thought my Camry was special!)
The only solution I found was posted by someone who sells his own invention (a bypass module) on eBay (for $130).
He claims that to get this fixed properly (by replacing the Car Computer/Fusebox) would cost $700 to $900.
His post is at- https://repairpal.com/car-doors-unlock-problem-747

So my question now changes to if his post is all true as well as if others have found other solutions.
For example -Other comments or ideas?

Thanks in advance for any info on this.

The device appears to have gotten good reports at sites such as Toyotanation.com. Might ask at that site.