I thought the working of keypad of Mobile as below_
- If we press any key, a particular signal is sent to IC/chip of
handset. And this signal is different for different keys to do
different operations. Please let me know if I am wrong.
- Please let me know what type of signal is that. whether it is
voltage or current or any other type...
- I posted this question to Technical support. they told me to
contact you (Discussion Boards). Please help me regarding

Thanks and regards
Basavaraj Tambur