Do any Android phones support 256GB of storage? I'd like a phone, preferably Android, with 256 GB of storage.  

To the best of my knowledge, no 256 GB microSD cards exist (despite a few scammy Amazon listings).  Therefore, the phone would either need to have (1) a fullsize SD slot or (2) dual microSD slots.  I don't know of any android phones that have a fullsize SD slot, although there are of course tablets that do.  And the only Android phone I know that promised dual microSD cards is the vaporware Saygus V2.

Do any solutions exist that don't involve solder or external devices?
A quick search on Amazon gave a bunch of results.


SanDisk Ultra has a 256GB model (red and pale yellow)
Samsung EVO+ has a 256GB model (red)
Samsung EVO Select has a 256GB model (green)
Other manufacturers also have 256 GB models, e.g. Patriot LX and ADATA Premier
Lexar has 256GB models but I've heard they're ceasing producing storage products


Oh, there's one more thing that I'd like to note: The "maximum supported storage capacity" actually depends on the SoC (chip) and system. So as long as your phone is running on an SoC later than 2015 and Android 5+ (Lollipop) then it should have no problem supporting a 256GB microSD card.