Smartphones notification "Sign in into..."

[humitos]

I tried with Android 5.x and 4.x and both work, but I have no idea about other phones.

This link shows many other ways about how smartphones check about a captive portal:

• http://stackoverflow.com/a/13365853/2187091

[humitos]

I have updated to Android 6.0 and there is no more notification on my phone.

[humitos]

Some improvement here: c06101cfd33967ab37236ee242d6837d1e8aa64f

[humitos]

Some ways to detect a captive portal: https://github.com/vtsatskin/FX-Captive-Portals-Design/blob/master/detection.md

[humitos]

https://github.com/wkumari/draft-wkumari-dhc-capport