On my 2004 Mini Cooper I jacked up the car and removed the power steering fan (two 13mm nuts) to gain access to the battery terminal on the starter solenoid (the one with the battery cable). I attached a battery charger to the terminal and powered the door locks long enough to open the driver's door. It's tight fit, but I have large hands and was able to do it.
Use your key in the door.
A locked phone should indicate to you that it is locked when you push a button, or swipe the screen.
Yes, if the battery is dead in an iPod mini you can replace it. Go to youtube and watch a guide on how to take the iPod apart. Also go on eBay and buy a iPod mini Battery. They sell for about 10 dollars at average.
Replace the battery or jump the battery.
If the battery is dead the alarm will not go off
Key
Key backup?
Yeah... sorry but break open a window.
Use your key to unlock the door.
By sticking your key in the door lock and turning.
Use a slim Jim
Use another vehicle to jump start it, or replace the battery, or charge the dead battery with a charger.