The dust has settled following last week’s global unveiling of four new iPhone 12 devices, with all of them supporting 5G, as well as dual SIM functionality. Unfortunately those users wanting to run dual SIM 5G on their devices won’t be able to, at launch that is.

According to internal documents for Apple employee training uncovered by MacRumors, Verizon (which is Apple’s 5G partner for the iPhone 12) has confirmed that the functionality will not be available, but crucially added that an update expected later in the year, will address this.

“Does 5G work with Dual SIM? When using two lines in Dual SIM mode, 5G data isn’t supported on either line and will fall back to 4G LTE. If customers are using eSIM only and are on a 5G supported carrier and service plan, they’ll have 5G access,” reads one of the slides shared internally for employees.

As such, when you first unbox your iPhone 12 and want to use dual SIM 5G, you’ll need to wait a couple of months for the update to rollout.

That said, it should be important to note that this is only what Verizon has detailed, so it remains to be seen what carriers and networks in other parts of the world choose to do. In South Africa for example, a few years ago it was difficult to find dual SIM devices in the country, but that has changed ince then.

With only a handful of networks supporting 5G currently, as well as coverage being quite limited, even in major cities, iPhone 12 users may want to use two 5G SIMs in order to maximise their coverage or mix up their call and data usage.

That said, given the premium pricing of 5G locally, you’re definitely going to run up quite a monthly bill.

As we still await local pricing and availability of the new iPhone 12 lineup, it should be interesting to see if local networks assist in supporting this functionality when the update rolls out.

When he's not reviewing the latest smartphones, Robin-Leigh is writing about everything tech-related from IoT and smart cities, to 5G and cloud computing. He's also a keen photographer and dabbles in console games.