Anyone who uses two cellular connections in parallel on the iPhone seems to have to do without a central innovation of the iPhone 12 for the time being. In dual SIM mode, access to 5G networks remains blocked, as an internal Apple document explains. So if you use a physical SIM card and the integrated eSIM at the same time, for example to separate between private and business connections, you automatically fall back on a maximum of one 4G or LTE data connection.

5G only for a single SIM If customers only use the eSIM and a corresponding 5G tariff as a mobile phone connection, there is also access on 5G networks, it says in the document, which is apparently intended for retailers and mobile phone partners and was published by a Reddit user. The same applies to the pure use of a nano-SIM, the iPhone can also transmit in 5G networks if a corresponding tariff has been booked with a 5G network provider.

Apple has not yet commented on the listed restriction, there is no publicly accessible support document on the subject. Accordingly, it also remains unclear whether the dual SIM operation in 5G networks will be delivered at a later date via software update for the iPhone 12. According to the user who published the internal document, this is planned anyway. The limitation of the dual SIM mode to LTE can also be found with other smartphone manufacturers, such as Google’s new Pixel 5 and 4a 5G.

Restrictions for 5G roaming 5G users must also expect restrictions for roaming for the time being. The iPhone may have the “best global 5G coverage” as Apple advertises, but roaming will only be possible to a very limited extent in 5G networks for the time being: network operators are currently still working on supporting roaming in the new generation of cellular networks, the internal FAQ explains. If data roaming is activated, you can use LTE instead when traveling – or you have to get a local SIM with 5G access. Network operators such as Deutsche Telekom have only announced around a handful of partners for 5G roaming in other countries. Apple for