I changed my phone and to be able to log in from my new device I had to remove steam guard. Now I need to wait 15 days to be able to do any trade. Can they fix this somehow if I contact them?

No, pretty certain that when the Steam Guard is changed or removed A 15 day period begins

You are out of luck. I tried similar and made a ticket in the past. And there is nothing their support can help you out with unfortunately. You are forced to wait it out.

That sucks hehe

Indeed. Im all for two-factor security etc, but steam is just on another (annoying) level xD

Tough, but worth it for those that wind up having their accounts compromised to get that buffer to try and get back control.

The amount of people I've heard of getting their accounts hijacked by rogue trade tokens in skin gambling sites etc. I've made the mistake with a new phone once before, I learned my Steam lesson then to make sure I transfer the 2FA's and update numbers if changed before factory resetting. Would be a bigger pain in the ass if the phone was broken