So far, I've only found out that Data Plan is the most common, or I must say, the defacto standard. I could find little to no reference of sharing a connection other than my data plan. I went through someone's post over another forum and found out that someone is doing just that. I asked how he did it and he posted screenshots to show how his S3 could route his home WiFi to his Laptop via USB Tethering.
I tried doing the same but at the moment I have no spare connection so I couldn't test this out, but, just for curiosity I tried looking into settings and found out that tethering is only possible for data plan So I installed all drivers (earlier they were giving a problem) then connected my Laptop to phone via USB cable and enabled tethering.
I thought I was done but then just to be sure, I disabled my SIM network. I turned on Airplane mode and then... tethering.disabled
Here, look how the option is grayed out
BTW my D410 is running on Stock ROM V10a-IND-XX, if it helps
My bad, I didn't know about the Airplane Mode and assumed that it only disabled the carrier network. Turns out that one has to re-enable WiFi after turning on the airplane mode.
Here, find the screenshots attached. It clearly shows WiFi will be disabled and when after enabling airplane, I turn on WiFi, it works.