E-SIMs may seem an economical solution to have data, but you have to deal with the following problems:
Tethering not allowed
Almost all e-SIMs allow data only on the phone where they are installed. This means you have to get more e-SIM to provide data to more people.
Your phone is not a router
Your smartphone is not designed to support tethering for hours (or days) but only occasionally. The smartphone antennas for WiFi transmitting (tethering) are small and ineffective (produce a WiFi radius of only a few meters) and considerably increase battery consumption. Also, as a phone performs many other functions at the same time, the additional processes necessary for the usage as a hotspot congest the processor and the phone becomes very hot and not responsive.
Speed limits
Even when e-SIM websites indicate "unlimited", speed is reduced after a pre-established daily or monthly data usage, often to so low values that your data connection becomes “unusable”.
Compatibility
At the moment, only a few smartphones allow you to use e-SIMs. Additionally, if your phone is designed for non-European markets (you come from outside Europe), you must check its compatibility with the mobile networks in Europe. Depending on your home country, some frequencies may be unusable, and your phone may be unable to use some of the antennas on the territory.
Tethering not allowed
Almost all e-SIMs allow data only on the phone where they are installed. This means you have to get more e-SIM to provide data to more people.
Your phone is not a router
Your smartphone is not designed to support tethering for hours (or days) but only occasionally. The smartphone antennas for WiFi transmitting (tethering) are small and ineffective (produce a WiFi radius of only a few meters) and considerably increase battery consumption. Also, as a phone performs many other functions at the same time, the additional processes necessary for the usage as a hotspot congest the processor and the phone becomes very hot and not responsive.
Speed limits
Even when e-SIM websites indicate "unlimited", speed is reduced after a pre-established daily or monthly data usage, often to so low values that your data connection becomes “unusable”.
Compatibility
At the moment, only a few smartphones allow you to use e-SIMs. Additionally, if your phone is designed for non-European markets (you come from outside Europe), you must check its compatibility with the mobile networks in Europe. Depending on your home country, some frequencies may be unusable, and your phone may be unable to use some of the antennas on the territory.