Ask HN: One World One Simcard
The Problem: As a frequent traveler (on a budget) to different countries I always find myself having to buy new sim cards in each country I visit to get network and data access while I'm in that country.
This involves keeping tracking of all my different sim cards for each country and taking them with me everywhere I go. Using the roaming features is just not viable due to the insane charges that are incurred. There are currently providers that offer a "one-sim" service but these services still dictate the prices that you have to use and have somewhat limited offerings / selections when it comes to packages.
The Solution: Why not create a service (website / app)that allows you to use one generic sim card all the time, but manage the networks you belong to via a website / app? For example, when currently visiting a new country, you would have to go into a shop / contact call center and get a new sim card to use any of a network provider's services.
Instead, now you would just log into your "One-Sim" account, select the network and package you want to join from a list of networks available in that country. The service would then register you on that network and then add that network to your global list of available networks. You then just switch to that network via the website / app and voila you are on the new network using one of their packages / contracts. When you return to another country, you simply go back to the app, select the network for that country and then the app connects you to that network.
Advantages / Disadvantages to follow...