How do import a wireless device for personal use to India:

If you are importing for personal use, then the Customs duty is levied. If you are a person who is Consistently Receiving the Goods from Abroad in your Name (As a gift or something) then you are under the scanner with customs and indeed you need to pay the Customs duty (Which may be sometimes higher than the product price itself or unless and otherwise, you have some approvals from the authorities for why you are importing and what’s the purpose of it).

Can wireless devices interfere with Wi-Fi?

The 2.4 GHz spectrum is pretty narrow and many devices run in it, not limited to Wi-Fi, Bluetooth, and microwave ovens (though note that for these guys you should normally have no leaks due to the shielding in them; having leaks means you should replace them).

Distant devices with low signals cause a lot of noise and prevent the router from effectively communicating with everyone, not just with the distant device. Of course, this only happens while the distant device is actively sending or receiving data, not when it’s idle. I have simulated such experiments (pandemic woes, if it weren’t for the pandemic I’d probably have done them in real life) for one of my college classes last year and have noticed the effects.

·         WPC ETA Approval?

WPC is a wing of the Ministry of Communication, a National Radio Regulatory Authority responsible for Frequency Spectrum Management. WPC Department issues WPC ETA certificates for IT and Electronic products while fulfilling the needs of the wireless technology users. Wireless and Bluetooth IT and Electronic products that run on unlicensed frequency bands and qualify human safety standards can be sold to Indian consumers only after WPC ETA approval.

Also read: How to Get BEE Star Rating?

How can I connect a wireless device to a Wi-Fi connection with only a modem wired connection?

If you are saying that you connect to the internet via a dial-up modem connected to a landline, then the answer could be as simple as using a serial to ethernet converter. you might have to improvise a programmed interface to talk to the modem. the easier way would be to use a small cheap device that can be programmed such as a raspberry pi. Such a device can speak both UART and Ethernet. Some programming may be required. There may already be Linux programs for this purpose.

Can you get Wi-Fi without a router and modem?