With just one day to go before Apple shows off its new iPhone 12 series - probably consisting of four models in different sizes and price ranges (iPhone 12 mini, 12, 12 Pro, and 12 Pro Max) - a possible snag has emerged related to the phones' headline new feature.

The big addition for 2020 is 5G; most pundits believe all four models will support 5G to some extent. Now, however, some concern has arisen that the cheaper versions, iPhone 12 and iPhone 12 mini, may have some difficulty actually using 5G in the UK, according to The Telegraph.

These models are expected to have more basic support for 5G, and no support at all for the 700MHz spectrum within the 5G standard.

The lower parts of the spectrum, around 700MHz, are often used by operators to extend the coverage to more distant parts, further away from the masts. An inability to make use of these part of the spectrum is likely to mean that iPhone 12 users will experience weaker 5G coverage; those who live outside major cities, for example, may struggle to take full advantage of the high-speed technology.

At the same time, The Telegraph notes that this could be to the advantage of operators such as Three, which has expanded across large parts of the 5G spectrum in the UK.

Catch up on the latest gossip in our iPhone 12 news hub. Once the handsets are announced we'll add the best places to buy to our iPhone deals roundup.

This article originally appeared on Macworld Sweden. Translation by David Price. Main image by Svetapple.