Hello.
Is it possible to send/get data via wifi hotspot or bluetooth offline (without internet conbection) ?
How do you mean? What exactly are you trying to do?
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I want to create multiplayer game, but without use internet or server, i want to use buletooth or hotsopt wifi to connect and transfer data between two mobike devices
Look into LAN networking; through the WIFI you have at home, you should be able to connect players without consuming data.