[inigyou]

That isn't something that actually exists

[londons_explore]

Replace micro SIM with micro SD, and it can be done on android.

[inigyou]

Still no. Plenty of references to SD card stuff in the main storage.

[londons_explore]

If you root it, you can put all writable storage on the SD card, and the phones internal memory becomes readonly

[stop50]

less than a minute of an duckduckgo search: https://www.sysmocom.de/products/sim/sysmousim/index.html

[coldtea]

This does at best 1% of what the parent mentions. Is that going to hold all your data across all your phone apps?