My friend and I tried #2 just now....he walked two blocks away, and around the corner, and was unable to directly unlock his car (2007 Scion TC). However, we connected via cellphone and I held the phone 4 inches from the car door. It unlocked!! But, I tried this with my ‘99 Camry, and it didn’t work.
“But, I tried this with my ‘99 Camry, and it didn’t work.”
I think you need to take your ‘99 Camry in to the dealer and ask to have the gullibility checked. You might be a quart low.
Last summer, a friend and I tried that with her new Razr and her 5-6-year-old car, and it worked just fine, and we were a couple hundred yards apart.