House upgrade? Tama 4U

I was reading my tamagotchi 4U book and saw this page. Can you upgrade your house? If so how?

I found the answer in this topic. It turns out that the house upgrades after the minimum number of connections specified in each column is met between two 4Us. So each number range show the amount of connections which will leave the house at its current level. I guess the idea is that the tama decided to fix up its house when it gets such and such visitors. People do the same thing also XD I remember hearing a sermon anecdote about a father forcing his kids to paint the house because company was coming.

That's neat about the 4u and kinda makes buying another one a bit better in addition to the special characters achieved through connecting on the 4u+.