[masklinn]

That's… exactly what the EU did, minus the legal mandate or adapter ban steps?

> In June 2009, many of the world's largest mobile phone manufacturers signed an EC-sponsored memorandum of understanding (MoU), agreeing to make most new data-enabled mobile phones marketed in the European Union compatible with a to-be-specified common EPS. All signatories agreed to develop a common specification for the EPS "to allow for full compatibility and safety of chargers and mobile phones."

> […]

> The original Common EPS memorandum of understanding expired at the end of 2012. The Commission reported at the time that all of the fourteen MoU signatories, "have met their obligations under the MoU." Eight of the original MoU signatories signed a 2013 Letter of Intent (LoI) to extend the 2009 MoU another year and, in 2014, five of those companies (Apple, Blackberry, Huawei, Samsung and Sony) again signed a second Letter of Intent, effectively extending the MoU through the end of 2014.

[tgsovlerkhgsel]

Doing "exactly that" but minus the legal mandate or adapter ban is like making "exactly" a cup of coffee but without the coffee or water. And then throwing the cup out 5 years ago, too.

Without the legal mandate and adapter ban, they might as well have done nothing. To this day, there are two common connectors for Android phones (Micro USB and USB C), a different connector for iPhones (Lightning), and proprietary connectors for most feature phones.