Nearly every phone we list supports two SIMs at once, usually one physical SIM plus one eSIM. That makes carrying a separate work phone optional for a lot of people.
How the phone handles two lines
Each line has its own number and shows its own signal bars. You choose which line makes a call or sends a text each time, or set a default per contact. Data comes from one line at a time — you pick which — and you can switch when, say, one plan's allowance runs low. Incoming calls on either line ring the phone normally.
Things that catch people out
- Data is one line only. The other line's allowance sits unused unless you switch. If you have unlimited data on one plan, use that line for data and let the other be calls and texts.
- Standby on both lines. Older or cheaper dual-SIM phones can only receive calls on one line while the other is on a call. Most current phones handle both.
- Employer-owned SIMs. If work provides the SIM and may want it back, an eSIM for your personal line keeps the two cleanly separable.
- Roaming. Abroad, each line roams according to its own plan. Turn off data roaming on the line you do not want charged.
Making it cheap
The second line rarely needs much. A rolling SIM-only plan with a small allowance, or a pay-as-you-go bundle, keeps a second number alive for very little; the same goes for keeping an old number when you switch your main plan. Compare the cheapest options sorted by monthly price, and check the phone supports eSIM if you want both lines without juggling cards.