It is a Prepaid SIM Card service that is specially designed for use by the international traveler. It offers the advantage of low-cost per minute rates for calling any fixed line or mobile number anywhere without the exorbitant roaming charges that are ordinarily imposed on calls made from a roaming handset. It is a service supported by best-of-class tier-1 GSM operators offering high-quality reliable services. With YES2 Sim you have all the standard GSM services including Voice Mail and SMS. There is no significant delay or inconvenience in the use of YES2 Sim to make a call. Receiving a call by the YES2 Sim is exactly the same as with a regular GSM SIM card; the important difference is that with YES2 Sim you achieve great savings.
YES2 Sim is designed specially for use by people who frequently travel between EU countries and USA. YES2 Sim is a Dual IMSI SIM (which is a SIM that has 2 profiles - one profile for use with a USA GSM operator and another profile for use with a UK GSM operator) that comes with a USA No. and a UK No.

The applicable per minute End User Rate for calling from USA to EU or from EU to USA is less than US$0.55/minute.

There is an additional charge of US$0.37/minute if an inbound call is dialed (called) to the USA No. of the YES2 Sim (instead of its UK No.) in any country where the YES2 Sim is roaming.

When you dial a telephone number from a roaming GSM handset equipped with YES2 Sim and press SEND, the YES2 Sim signals its home GSM operator (i.e. the operator that issues the YES2 Sim) to do the following:

(a) to call back the roaming GSM handset to the telephone number that is assigned to the roaming GSM handset by the foreign (local) GSM operator of the GSM network servicing the GSM handset

(b) to call the destination number that you have dialed and then bridge (or connect) the 2 calls (a) and (b) to enable you to have conversation with the party at the destination number.

The operation described in (a) and (b) above are transparent to the you, the user, and you do not experience any significant delay in making the call. As the call is dialed by your home GSM operator through its normal high-quality carrier network, you would experience the normal high-quality service.

Yes. YES2 Sim incorporates current advanced SIM technology and supports all standard features of a GSM service.

Free SMS incoming on YES2 Sim.

Yes. All calls that are not answered after a certain number of rings (programmable to suit) are automatically routed to a Voice Mail Server where the caller can leave a voice message for the called party.

To retrieve the voice mail message, you simply dial 121 or *121#.

There is a small per minute charge for accessing the Voice Mail Server plus the air time at the per minute rate for calling a UK number from the country where the YES2 Sim is located.

There is no charge for receiving incoming calls when roaming in countries where the local GSM operators do not impose a per minute surcharge on calls made by foreign GSM handsets roaming in their GSM network.

There is no charge on receiving incoming calls when roaming in the countries which you can find at "yes two free incoming countries" list.

The GSM operators of some countries impose a per-minute charge on all visiting (roaming) GSM handsets making a call through the local/country GSM network; the applicable charge is imposed by the local/country GSM operator. There is a per minute charge for receiving incoming calls when roaming in the when roaming in the following countries:

Afghanistan, Albania, Andorra, Anguilla, Antigua/Barbuda, Argentina, Armenia, Aruba, Azerbaijan, Bahamas, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Botswana, Brazil, Brazil TIM, British Virgin Islands, Bulgaria, Burkina Faso, Cambodia, Cameroon, Canada, Cape Verde Islands, Cayman Islands, Chad, Chile, China, Colombia, Comoros, Congo, Congo Dem Rep, Cuba, Czech Republic, Denmark, Djibouti, Dominica, Dominican Republic, East Timor, Ecudaor, Ehtiopia, El Salvador, Equatorial Guinea, Faeroe Islands, Fiji Islands, French Polynesia, Gabon, Gambia, Ghana, Gibraltar, Greenland, Grenada, Guadaloupe, Guam, Guernsey, Guinea, Guyana, Haiti, Honduras, Hong Kong, Iceland, India, Indonesia, Iraq, Isle of Man, Ivory Coast, Jamaica, Japan, Jersey, Kazakhstan, Kuwait, Laos, Lebanon, Liberia, Libya, Liechtenstein, Macau, Macedonia, Madagascar, Malaysia, Maldives, Mali Republic, Martinique, Mauritania, Mauritius, Mayotte Island, Mexico, Moldova, Montenegro, Morocco, Mozambique, Namibia, Nepal, New Zealand, Nicaragua, Oman, Pakistan, Palestine, Panama, Paraguay, Peru, Philippines, Qatar, Reunion Island, Romania, Russia, San Marino, Senegal Republic, Seychelles Islands, Sierra Leone, Singapore, Slovenia Republic, Somalia, Sri Lanka, St.Kitts & Nevis, St.Lucia, St.Vincent/Grenadines, Sudan, Suriname, Switzerland, Syria, Taiwan, Tajikistan, Thailand, Togo Republic of, Trinidad/Tobago, Tunisia, United Arab Emirates, United Kingdom, Uruguay, USA, Uzbekistan, Yugoslavia/Serbia, Zimbabwe.

The per minute is still some 50% less than what you would pay if you were roaming in these countries using your regular SIM issued by the GSM operator of your country of residence.
There is an additional charge of US$0.37/minute if an inbound call is dialed (called) to the USA No. of the YES2 Sim (instead of its UK No.).

YES2 Sim service is designed primarily for use by the business traveler. You can use the YES2 Sim service when you are in any of the following countries listed at our section "yes2 coverage".

YES2 Sim is based on 3G technology supported by GSM operators that deploy best-of-breed technology to provide best-of-class services. The outstanding service features are:
Calls are made in the format + telephone number where telephone number consists of country code, area code and local number.
Roaming in more than 190 countries without the regular roaming charges.
The low per-minute rates for making calls in any of the 190 countries to telephone numbers anywhere in the rest of the world offer a saving of up to 85% when compared to the cost of making the same call while roaming in the country.
USA phone number and UK phone number for people to call you.
You get at your GSM handset equipped with YES2 Sim the Call Details Record and Call Cost after each call.
You can make Account Balance inquiry.
You can send and receive SMS messages.
You can access YES2 Sim's web services to view complete history of calls made and received.
You can purchase YES2 Sim credit on-line at with your Credit Card, Paypal or Moneybookers. Note: Usage of the online payment features require a prior authorization by EX4U Telecom.

YES2 Sim service is very easy to use. It takes 3 steps:
Insert your YES2 Sim into your mobile handset.
Switch on your handset and enter the PIN code provided with the YES2 Sim if necessary.
Your handset will automatically connect to an available GSM network in the country.

No. YES TWO Sim works with most GSM phones as long as the phone is SIM unlocked. When you purchased the phone from your mobile telecom operator, the operator may have "locked" your phone to prevent its use with other mobile operators' SIM cards. Consult the vendor of the mobile phone to get it unlocked.
YES TWO SIM works with unlocked iPhone, BlackBerry, Windows, Palm and SmartPhones.

When you key in the number you wish to call in the dialing format
+ country-code area-code local telephone number
YES2 Sim performs its special call routing operation. This operation may cause your handset to display messages such as "number not allowed", "blocked call", "invalid number" perhaps followed by "sending message". These messages are the GSM handset's response to YES2 Sim's call routing requests and are normal, and you should disregard these displayed messages.

If you are using an approved GSM handset, you will get a callback call from the home GSM operator, and your GSM handset will ring. You should then press the "Send/Yes" key to answer the incoming call and hear a voice message that tells you to wait for the call to be connected to the party at the destination number.

An approved GSM handset equipped with a YES2 Sim will automatically connect to an available GSM network. In some countries where there are more than one available GSM operator that can support the YES2 Sim, you may manually select a supporting GSM operator if automatic connection to the default GSM operator is not successful. This can happen if you are in a country where there is more than one roaming agreement with various GSM operators. When you are unable to receive or do not receive a callback call after you have initiated the calling operation, you may manually select another available GSM operator to initiate the calling operation again.

You have to do the following:

Sign up online on our Contact Us online-form on this site or with your local reseller of YES2 Sim service to become a subscriber for YES2 Sim service to open a YES2 Sim account . You will receive a confirmation email from us.
Purchase a YES2 Sim choice
Prepay a minimum credit amount, please see the YES2 Sim choice options in the „yes sim rates“ section.

Note that YES2 Sim is a prepaid service. When there is no credit remaining in your YES2 Sim account, you will not be able to make calls using the YES2 Sim service. The maximum duration to be allowed for a call, that you want to dial, is calculated, based on the per-minute rate according to the dialed destination number dialed and the available credit in your YES2 Sim account, by the YES2 Sim system before the call begins.

Contact US online to purchase your Demo YES2 Sim card or an authorized reseller of YES2 Sim service in your local area can give you a demo to show you how the service work and let you experience the high voice quality of the service.

To apply to become a reseller of YES2 Sim service, write to us and one of our representatives will contact you within the next business day to speak to you about the YES2 Sim Reseller Program.

The software that supports the user interface for the YES2 Sim service is designed to support private-labeling if required. The decision to offer private-label production of YES2 Sim service will depend on the business proposition of the proposing party. YES2 Sim supports a 3-level hierarchy or food chain arrangement including 1 levels of resellers. For further details please contact us or a YES2 Sim service sales manager.

*122# Enable voicemail
*123# Disable voicemail
*122xx# Set the number of seconds before voicemail starts, such as +12235#
Sample for 35 seconds.