~snip~
There are many problems in the 3rd world country - one of the main issues is illiteracy and then the access to internet and there is non availability of smartphones to keep a track of the things. So the physical bitcoin won't be successful anytime sooner.
Access to the Internet is done through smartphones in places like Africa.
Many people don't have a computer or laptop, but they do have a smartphone. Any cheap Android phone is capable enough to do anything really.
This was a thing in early 2010s, the poor countries basically skipped the PC era, and went straight into smartphones, mostly because they are extremely cheap comparatively (not a flagship of course).
Internet access through 3G at least, is almost everywhere