Another genius idea from people who’ve never been near a cell tower: “Apple makes great chips, so of course it can build a modem.”

No. A cellular modem is not a chip you finish and forget. It’s a negotiation with every network it meets, and the network always has the upper hand.

Apple bought Intel’s smartphone modem business in 2019. Six years later, it has a modem. That’s not slow. That’s realistic. An acquisition brings people, patents, and half-finished work. It does not bring the scars of a decade of field failures, the carrier-specific quirks, or the radio behaviors that only show up at 3 a.m. in a rainstorm.

“Just build the modem in-house” is a sentence spoken far from a cell tower. The radio does not care how good the rest of your chips are.

Here’s what a modem actually has to do:

  • Support the network generations the target markets still use, because LTE isn’t going anywhere and neither is legacy fallback.
  • Handle the required bands and band combinations, which multiply faster than carrier marketing slides.
  • Keep connections through handovers, weak coverage, and the usual mess of real-world conditions.
  • Meet power, heat, and device-integration limits, because a phone that melts or dies by lunch is a phone that gets returned.
  • Clear regulatory and carrier testing, which is where “works on my bench” becomes a punchline.

Cellular standards are not a polite suggestion to the radio. They’re a contract, and the network enforces it. A modem has to work with equipment from multiple vendors, on towers that didn’t read its design brief, in environments where the signal is a suggestion.

And then there are the patents. Standard-essential patents are a separate legal and licensing minefield. Passing a network test doesn’t settle them.

People say Apple already designed sophisticated chips, so a modem should have been straightforward. Sophisticated, yes. Straightforward, no. The hard part of a modem starts when it meets a real network.

The tower has never been impressed by a launch presentation. “Works on my bench” remains an unpopular carrier certification program. Radio waves continue to decline invitations to behave neatly.

You can buy a modem business. You still have to earn a working modem.