Get SIM card connection info If I want to know if I am connected 2G, 3G or 4G, how do I check that on Android? 

I don't seem to have any default SIM-related app on my phone, nor does the SIM setting screen give much information other than APN details (APN type says "default").

I'm using FlymeOS 6.1 (Chinese ROM based on 5.1 Lollipop).
There is information under About phone->Status->SIM Status.

The relevant field is Cellular network type.

3g if:


UMTS
HSPA
W-CDMA


2g if:


EDGE
GPRS
GSM