1. 112 works only with GSM cell phones. I doubt it will work outside Europe. Other areas have different emergency codes (911 in the North America). I’ve never tried dialing 112 from the US and have never had to in Europe - but it’s good to know.
2. Go ahead, try it. Burn all the minutes in your plan trying to make your cell phone act as an RKE repeater. If you can get it to work let me know.
3. This is the full rate codec code for GSM phones (don’t know if CDMA uses the same code). It will actually reduce your talk time, not improve it. But the conversation will be clearer.
4. This is a GSM only feature. Everyone should record this number, called the IMEI, or at least record the one listed in very small print in the battery compartment of the phone, which is about 99.999 accurate. The CDMA equivalent is called the ESN. If you manage wireless for an enterprise you can use an up-to-date, secured list of IMEIs to impress your auditors.
5. You still get nailed for the per minute charges, just like any other “toll free” call on a cell phone.
This list seems to have originated in Europe since the parts that are more or less accurate pertain to GSM phones.
If you use Verizon or Sprint in the US, you have CDMA (Bell Mobility or Telus in Canada). If you use T-Mobile or AT&T in the US (Rogers or Fido in Canada) you uses GSM. Your CDMA phone won’t work in Europe, or most other countries outside North America period.
My phones from Motorola for the past 3 years have been GSM. (Sprint) CDMA is so 90’s.
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.