This adapter will only work for a specific set of Vita owners. You must have a 3G OLED model (typically the model number is PCH-110X) that is running firmware 3.60 or less (in order to use the HENkaku hack, which is required). However, a quick search on Aliexpress shows that Vita motherboards running firmware < 3.60 are on sale for about $25 a piece. So you can always buy one and swap your current motherboard (even if it is a Wifi only OLED model) with it.
Si de verdad funciona soldando, existe algun conector de mini pci e para soldar? yo no he encontrado ninguno.