This is one thing that has really ticked me off over the past couple years. My launch day iPhone 5s had a loose, crunchy home button and it left that "poor quality" feeling in my mind.
I got it replaced several times, and low and behold the replacements had similar issues...wiggly, crackly, home buttons. I envisioned them rushing to put the phones together to get them shipped out as quickly as possible.
I finally just accepted the fact and got used to it. But I'm not going to lie, it irritates me clicking that darn home button when I had to. It was always a reminder of the poor, rushed workmanship that went into making the devices.
The same thing happened with my iPhone 6. Only this time my
Expectations were lowered given what happened with the 5s. So I didn't get it replaced and just dealt with it again.
However I did get my phone replaced recently for another issue and the home button I am using now is PERFECT. Feels solid, tight, and never makes a crunchy/wiggly noise.
This phone was made in April of this year whereas my others, including the 5s were all launch day phones.
So, I have to believe what I said before...they rush the manufacturing of the devices for all the preorders and then when things are relaxed and the demand has died down, they can actually take their time and make sure the phones are built right. This isn't to say anything bad about the employees of Apple making the phones, I'm sure they rushed and it's stressful given the demand for this product
I usually get the new iPhone every year, but I am contemplating keeping my 6 simply because this home button feels perfect and the rest of the phone feels premium as well.