S4 codes
Another old one yet useful.These Codes are related to S4.If u have the phone do try them!Monitor Mode - how to activate:
Press left soft-key, then 9 (SET UP) 8 (Phone Status). You will see IMEI number, then press left soft-key and in order 7684666 and red phone at the end (monitor mode has been activated). To read information from Monitor Mode - press left soft-key, then 5 (GSM SERVICE) and 6 (Monitor). Monitor mode turns off when you switch off the phone. You must activate it again if you want.
How to see date of software:
Press left soft-key, then 9 (SET UP) 8 (Phone status). You will see IMEI number, then press twice left soft-key, 98, left soft-key, 7684666, red phone (activates Monitor Mode), left soft-key, 56 (turns on Monitor Mode), left soft-key, 98, left soft-key, 7684666, hang up (red phone) >abck to "normal" and then left soft-key, 56.