Probably something below 20 Hz. They are done with rotating motors with unbalanced shafts. Here is a page that shows lots of products.
My guess is the shaft spins on the order of 5 or 20 rev/sec - giving a fundamental frequency of 5 to 20 Hz. Maybe 10 Hz...
Depends on the cell phone.
go to recent call then go to cal duration on your cell phone if that doesnt work then you can probley call your cell phone company
say"excuse me by cell phone just died, can I use your phone for just a sec?" then call your cell phone this way you both have each other's numbers.
Your cell phone, your TV, your "radar range".
I set my cell phone to vibrate.
i think it is the motor that is in the vibrate in a cell phone
Its a safety feature only provided by nokia. Suppose you have place your cell phone in tiny place like in table or some where else and in your absence your cell get vibration from the call than there is a chances to fall your mobile from height and your cell may get damaged. So to prevent to happen such things nokia provides this feature.
You cannot change a phone's frequency.
it cant be charging
And it's rude to have the phone ring while you're on a date.
Yes, most phones can be programmed to do that.
The basic concept of the very first cell phone was developed in 1947. When the first cell phone came out in 1968, it only had a frequency range of a few miles.
The frequency of the phone would depend on the model and the carrier or service provider it runs on. It would not depend on the phone number.
There are two ways this term could be interpreted. One, is phantom cell phone vibration, which is when one imagines that their cell phone is vibrating even when it's not. Another is the phantom cell phone which can indicate either a phone that is voice-activated or extremely thin/white.
500 Mhz to 4Ghz