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Short guides to eSIMs, running two lines on one phone, and setting your phone to switch by itself.

• What is an eSIM?

  A SIM that is built into your phone and set up by scanning a code.

  2 min read
• How two lines work on one phone

  Which line handles calls, texts and data when your phone has two.

  3 min read
• Turn on automatic data switching on iPhone

  One setting that lets your iPhone move data to SecondBars by itself.

  2 min read
• Turn on automatic data switching on Android

  Where to find the setting on Pixel and Samsung phones.

  2 min read
• Will SecondBars work on my phone?

  The three things your phone needs, and how to check each one.

  3 min read