Careful with "up to" claims...
- Talktime is likely quoted at minimum TX power, ie you're sitting under a cell station
- Standby time is likely quoted with the maximum interval between network polls (on GSM this is called the DRX level). Whether you get this time depends on how the provider's network is configured - and yes, networks are almost never configured with an interval this long...
Still, it does sound like it's not working right if there's a 6:1 difference between claimed and actual talktime...
I don't know, I think you might be on to something with your first point. My mom used to carry her cell in her pocketbook all day long, and even though she charged it every night it would still be out of juice by the time she left for work, and she never even talked on it. At the urging of my dad and I, when she gets to work she takes the phone out of her purse and puts it on her desk. That's all, nothing more, and now when she leaves for the day she has about 3/4 of her battery left.
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