Smart Folder page on Namu Wiki
Has separate soft keys. Runs Android 5.1.
Source: Reddit post 1, Reddit post 2
There are 4 variants of the Galaxy Folder 2:
The G1600 variant doesn't have separate soft keys. Instead, like the 心系天下 series, 3 of the 4 keys around the D-pad are Android keys. G160N and G1650 have separate soft keys; the 3 Android keys are in a row above the D-pad and soft keys.
The Chinese variants can be updated to Android 7, while the Korean variants stay at Android 6.
W899 ~ W2019 (inclusive) are android keypad flip phones with dual touch screen (i.e. outer screen is also a touch screen).
W20 onwards are screen-folding phones, based on the Galaxy Fold series phone of that year (except Wxx Flip which is based on Galaxy Flip). They are out of scope for this site.
On Android keypad flip phone models, the 4 soft keys around the D-pad are Android keys: home, back, recents, and another key that differs in different models. so it might not be suitable for playing J2ME games, sadly.
Being a luxury series (as the next two series are too), the official price for phones in this series is high. The W25, which is officially for sale as of this writing (January 2025), costs 16k CNY for the 512 GB model, and 18k CNY for the 1 TB model. (Source) W2019, the last keypad phone in this series, cost 19k CNY for 128 GB storage, and 22k CNY for 256 GB storage at launch. (Source)
Being a luxury series also means that it became a tool for vanity, and as with any such tool, people would go for fakes if they can't actually afford the real thing. (After all, there were people selling "screenshots with Dynamic Island" on Xianyu, presumably so the buyer can fake that they own an iPhone 14 Pro / iPhone 15. This was when iPhone 16 didn't exist; I don't know if such sellers still exist.) So, there are a lot of bootleg W2019 phones, some blatantly labeled as bootlegs, some not.
So I don't recommend getting a W series phone for playing J2ME games.
There are also the 大器 series and the 领世旗舰 series which are similar to the 心系天下 series, but those two series were discontinued even earlier, with the last models being released in 2014 and 2017 respectively.