Tag: mobile

How can I find my mobile phone IMEI number?

You can easily find your IMEI on most phones by simply entering *#06# on the keypad. Some phones call it a serial number rather than the IMEI, which can be a little confusing. If *#06# doesn’t work with your phone there…

Autopsy of a cellphone

Here’s another in our line of technology autopsies – a GSM cellphone. This one came from a car boot sale but had no subscriber identity module (SIM) card so it wouldn’t work. The SIM card slotted into the back of…

GSM phone technology

GSM cellular phones use a combination of Time and Frequency Division Multiple Access. TDMA simply means that several stations can share a frequency by taking turns. The difficult bit is making them think they’ve all got the channel to themselves.…