Originally Posted by shahi.persian
any code for testing health of WiFi ?
Not sure what did you mean actually by health of wifi, but you can try these 2 codes:
#1- Use Phone INFO ★Samsung★ app > Menu > 'Secret Codes' > 4636 > Launch 0 > WiFi Information.
#2- Also in the above 'Secret Codes' menu, select 0011 > Launch 0 > Menu button > WiFi.
Please note that #1 requires root to work. The secret code *#4636# does not work on Samsung dial pad without root. If you don't have root, you can try #2 by open the Dialer and enter the code *#0011#.