Passport-sized photos are often required to obtain a visa upon arrival, in countries like Nepal, and for purchasing a local SIM card for your mobile phone, in countries like India. They’re also handy to have in case you have to get a replacement passport while traveling.
Travel Tip: As you prepare for your trip, be sure to stock up on extra photos. If you’re visiting just 1 or 2 countries, bring at least 4 extra photos. For trips involving more countries, an extra 6 to 8 should be good. The cost of getting extra photos is often nominal and you’ll save yourself the hassle of getting them in transit.