It is impossible to get a Voice enabled Japan SIM card without a permanent address once you reach Japan, but data only SIM cards are available for travelers to Japan
Getting a Japanese SIM card
The process getting a Japan SIM card is quite painful, anyone who intends to buy a voice-call-capable SIM card (prepaid or postpaid) needs to show a proper identification which indicates that he/she has a residential (permanent) address in Japan. A hotel address is not sufficient for this purpose. However, this law does not apply to data services and data-only SIM cards.
SIM at airport
Data Only SIM cards are available at Narita International Airport, where you can get a SIM card through vending machines .The airport will have two such machines, for Terminal 1 and Terminal 2, with only credit cards accepted for added ease. users will need to register their information in order to activate the service. However, it can be done by scanning their passport information at the vending machine.
Buying a Hong Kong SIM card in Hong Kong is easy for travelers, but calling India is not cheap.
Availability of SIM cards and Registration
SIM cards in Hong Kong don’t need registration and are sold in many stores. It’s recommended to go to stores of the operators or a small independent phone shops where somebody speaks English, so he/she can help you with setting up. Reload vouchers can be found all over the city in places like 7-Eleven, 1010, HKT , Grayline or Circle K convenience stores.
SIM cards are also available at the Airport. There are shops of cellular networks e.g. China mobile is located Terminal 1, Arrivals Meeters & Greeters Hall, Level 5. Furthermore, some retailer shops such as Nobletime AV & Telecom, 1010 and FORTRESS also sell sim cards.
Buying China SIM cards in China is difficult for travelers due to language barriers, national roaming charges, the lack of International calling on most cards and the sometimes high cost to call India. Beware also of the occasional scams!
Most Chinese SIM cards are regional, which means if you travel to a different province you’ll pay higher rates, so try to buy a SIM card in the province where you’ll be spending the most time. SIM card information related to Beijing will be discussed below.
SIM Cards are sold everywhere in Beijing. You can buy a SIM card right at the airport. Alternatively, they are available in departmental stores, bookstores, post office, and sometimes on the street. The value of the card is stated clearly on the card, and that’s how much they sell it for. You might get a SIM card from a retail store on street, but you still have to go to the service point of the carrier for official registration and activation before using it.
Buying an Italy SIM card is relatively easy for travelers to Italy, and there are packs available that include some free calls to India. After the pack however, you may end up paying high rates to call India. Also, these SIM cards are not useful if you intend to travel to multiple countries
Availability of Italy SIM card
Italian sim cards are available at Fiumicino Airport, Rome, Italy. It has a Vodafone shop, at Area B, T1 Departures Mezzanine Floor and TIM shop at T1 – Boarding Area B. At branded shops you will pay the original price. You can get them in the shops of the providers where they will be registered as well. Top-ups can be bought at many more places like tobacconists(blue-‘n-white / black-‘n-white “T” signs), supermarkets, newsagents and even bars or coffeeshops
Buying Australia SIM cards in Australia is easy for travelers, but beware of per call connection charges of some SIM cards.
Visitors who come to Australia for a holiday and purchase a prepaid SIM card will need registration. You require your passport for registration.
General Availability of Australia SIM card
Australian SIM Cards can be obtained from phone shops at most airports such as Melbourne airport, Optus is located in T2 Arrivals, ground level, whereas at Sydney airport Vodafone kiosk is located at T1 International (Arrivals) near exit A. Australian SIM Cards can also be obtained from a supermarket and online from mobile network provider’s website. Try to get your SIM card in a branded store of the provider at airports where you pay the original price.
Prepaid Singapore SIM cards are easily available for tourists at Singapore both at the airport as well as in town, but you need to watch out for being overcharged.
General Availability of Singapore SIM cards
Singapore prepaid SIM cards are available at the Changi International Airport at the 7-Eleven convenience store which operates 24 hours at the Departure Transit Lounge of Terminal 1 and Terminal 2, Departure Check-in Hall at Budget Terminal. But they maybe overpriced at airport.
Prepaid Thailand SIM cards are easily available for tourists to Thailand both at the airport as well as in town.
General Availability of Thailand SIM cards
At the airport, outside of the International gates, there are kiosks for DTAC (blue colour), AIS (Green colour) and True Move (Red colour). Try to get your SIM card in a branded store of the provider, at airports or in malls or in 7-Eleven kiosks where you pay the original price. Many independent sellers will only sell you the SIM with a surcharge like a tourist SIM of 299 THB for 399 THB.