四儿子购买手册

http://www.miui.com/thread-910308-1-1.html

https://play.google.com/store/devices/details?id=nexus_4_8gb_black_promo&feature=ha-text-sem_bk-n4&utm_source=ha&utm_medium=text&utm_campaign=sem_bk&utm_content=n4&gclid=COD5kpq9wrgCFUbEpAodiG4AAA&gclsrc=ds

五儿子都出来了，四儿子基本要淘汰了~