Open-source zackb/tether tool reads iPhone messages on Linux over Bluetooth

By Khal · · 1 min read

Editorial illustration: A glowing blue arrow carries message, contact and bell icons from a smartphone toward a desktop monitor. A Bluetooth symbol floats above, and a Linux penguin sits beside the monitor.
AI-generated editorial illustration · AI-generated editorial illustration · Published Nov 7, 2026, 1:18 p.m. (1 hour ago)

In brief

  • zackb/tether is an open-source GitHub tool, not the USDT stablecoin issuer.
  • Version 0.2.0, shipped August 19, 2026, added clipboard sync and file transfer.
  • Linux desktops read iPhone SMS, iMessage, contacts and notifications over Bluetooth with no iOS changes.
  • BlueZ 5.86 or later, with experimental features enabled, is required for full functionality.
  • Crypto Briefing flagged stability and privacy tradeoffs.

What version 0.2.0 added

Tether version 0.2.0 shipped on August 19, 2026. That release brought clipboard synchronization and file transfer between phone and desktop, but the bigger change was Bluetooth access to SMS and iMessage conversations, contacts and app notifications on Linux. Nothing has to change on the iOS side.

The Linux computer, in other words, emulates a paired Bluetooth accessory.

The project's GitHub repository, as reported by Crypto Briefing, says it leans on three Bluetooth profiles: MAP (Message Access Profile), PBAP (Phone Book Access Profile) and ANCS (Apple Notification Center Service). The Linux side runs on BlueZ, and full functionality requires BlueZ 5.86 or later with experimental features enabled. Setup takes two commands, tether --bt-setup and then tether --bt-pair. After pairing, users still have to grant iOS permissions for notifications and contacts before any data starts flowing.

Recent work centers on reliability

The 0.2.0 release isn't new. The recent changes are documentation updates from early November 2026, which added improvements to ANCS over BR/EDR (the classic Bluetooth connection mode) and also covered dual-bond handling and expanded troubleshooting guidance. Crypto Briefing wrote that the November focus suggests connection reliability is the main area still under active development.

Stability and privacy caveats

Crypto Briefing also flagged a couple of tradeoffs. The BlueZ 5.86 requirement could mean some Linux distributions need updates before the tool works fully, the outlet wrote, and experimental code carries its own stability caveats. Then there's privacy: granting a desktop access to messages, contacts and notifications widens the set of devices holding sensitive personal data, according to the same report.

As for the name, it's a coincidence. Crypto Briefing said the project is separate from the company behind the USDT stablecoin, so the overlap doesn't point to any link between the two.

Frequently asked questions

Is the zackb/tether project related to Tether, the USDT stablecoin issuer?

No. Crypto Briefing reported that this Tether is an open-source developer tool on GitHub, separate from the company behind the USDT stablecoin. It said the shared name is a coincidence.

How does Tether read iPhone messages on Linux without an iOS app?

The Linux computer emulates a paired Bluetooth accessory. It uses the MAP, PBAP and ANCS Bluetooth profiles to reach SMS and iMessage conversations, contacts and app notifications, so nothing has to change on the iOS side.

What does Tether require on the Linux side?

The Linux side runs on BlueZ, and full functionality requires BlueZ 5.86 or later with experimental features enabled. Users set it up with tether --bt-setup and tether --bt-pair, then grant iOS permissions for notifications and contacts.

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