I've noticed that you don't need a landline for internet and I'm staying in temporary accommodation. Can I buy the no landline broadband even without connecting it into a phone wall socket? Just because I don't have one.
No 'landline' means no telephony. You still need a physical copper or fibre line to deliver broadband, it doesn't arrive by magic.
You would be better considering 4G deals
it is a total misconception that you can get broadband without a landline whether that is a copper or fibre line. you need the line to get the broadband connection you can get broadband without the ability to make or receive calls but still need the line and pay line rental included in the broadband package