Points to be noted :
Nearest Airport : Hanoi Airport. All the above mentioned places are closer from here.
Food : Vietnamese cuisine majorly consists of Non vegetarian dishes. It would be kind of hard to find pure vegetarian restaurants. However, most homestays will provide vegetarian food on request.
Transportation : The best and the cheapest mode of transportation is by hiring a motorbike to commute within a city. It costs around INR 500 per day. It will be arranged by the people at the place you stay. You may have to surrender your Passport to hire one.
The next best option is GRAB TAXI. It is the Uber of Southeast Asia. Link your Debit/Credit card and it will be hassle free. Drivers don't cheat you.
Language : Vietnamese people do not know English. Google Translate will be the best option for you to interact with locals
SIM Card : It is easy to get SIM Card at the Airport by producing your Passport. It typically costs around $15 for Data and for call for a period of 10 days.
Accommodation : AirBnB is the best option. Homestays are available at very reasonable rates. Go by the reviews posted by other travelers.
Currency exchange: I exchanged the currency at the airport itself. Otherwise, you can also withdraw cash from ATMs at a nominal charge.
Etiquette : Vietnam is a peace loving country with super friendly locals. Be polite with them. Also, cleanliness is highly followed. Please do not litter be it in Vietnam or anywhere else.
That being said, Vietnam is a country I'll definitely suggest anyone who asks me where to plan a vacation to, next.
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