The short answer
For a business trip you have three ways to stay online: a travel eSIM, a local SIM, or a roaming pack from your home operator. An eSIM is usually the quickest, because you add the plan by scanning a QR code before you fly, so you are online when you land. Whichever you choose, keep your Indian number reachable for bank codes and work authentication, and compare data allowance, coverage and hotspot rules rather than price alone.
Key terms in plain English
- eSIM: a digital SIM built into the phone. It needs a phone that supports eSIM and is not locked to one operator.
- Roaming pack: an add-on from your home operator that lets your number work abroad.
- Hotspot or tethering: sharing your phone's data with a laptop. Some plans limit or block it.
- OTP: the one-time code a bank or app sends by text.
How the options compare
| Option | Good for | Watch for |
|---|---|---|
| Travel eSIM | A short trip, set up before you fly | Data allowance, coverage, hotspot rules |
| Local SIM | A longer stay | Needing ID or an address, finding a shop on arrival |
| Home roaming pack | Keeping one number | What the pack covers and how it is billed |
Keep your home number working
Banks and some work systems send codes to your Indian number. If your phone supports two lines, you can keep the home SIM active for codes and use the eSIM for data. Otherwise, check with your operator how texts are delivered while you are abroad, and consider switching key accounts to an authenticator app before you leave.
Work security
Check your employer's rules before you install an eSIM or a VPN, because some company phones are managed. Avoid public Wi-Fi for anything sensitive, turn off automatic connection to open networks, and keep devices updated. Our scams guide covers phishing aimed at travellers.
Checklist
- To do: Phone checked: eSIM support and unlocked status
- To do: Employer's device and VPN rules read
- To do: Plan chosen on data allowance, coverage and hotspot rules
- To do: eSIM installed while on Wi-Fi before you fly
- To do: Home number kept reachable for bank codes
- To do: Key accounts moved to an authenticator app where possible
- To do: Offline maps and tickets downloaded
- To do: Plan cancelled or allowed to expire after the trip
Common mistakes
- Buying for price alone. A cheap plan with poor coverage costs you in lost meetings.
- Locking yourself out of bank codes. Plan for them before you swap SIMs.
- Leaving installation until the airport. Do it on Wi-Fi beforehand.
- Ignoring tethering limits. A laptop on a plan that blocks hotspot is no use.
Things that change
Plans, coverage and roaming terms change often, as do the rules on identity checks for local SIMs. Check the seller's current terms.
Verify before you act
India's telecom regulator, the TRAI, publishes consumer information about telecom services, including roaming. Check your own operator's roaming terms and your destination's rules for buying a local SIM before you travel.