5G mobile connectivity is arguably the signature feature for the new iPhone 12 range, but some early adopters may have to wait a while to feel the full benefits of those next-gen data speeds.

According to a purported training document published on Reddit over the weekend (via MacRumors), 5G connectivity will not be available while the iPhone 12 is in Dual SIM mode.

In the document reportedly shared with retailers and carriers, Apple states data speeds will be throttled to 4G LTE while in Dual SIM mode – at least until an update arrives to remedy the situation.
…
Continue here:
https://www.trustedreviews.com/news/5g-on-the-iphone-12-wont-be-fully-functional-at-launch-report-4104634