FREQUENTLY ASKED QUESTIONS

• We can move your airtime balance and PEN if any from your standard SIM to the Universal, Expedition, eSIM World, DataMax, or DataMax eSIM SIM if you upgrade the SIM or your sim is lost or damaged and you are buying a replacement SIM. The replaced SIM will be permanently deleted from your account.. 
• We can move your Personal Extra Number from your sim to any other SIM. There is $5 charge for this.
• We cannot transfer your primary +372 number from your Standard SIM to any other SIM, you will get a new number when you upgrade. 
• NOTE: DataMax and DataMax eSIMs do not come with any primary phone number. You can purchase a PEN to use voice and SMS with our OneSIM VoIP App

Yes. If you would like to upgrade your Standard, Plus, Europe & More, Expedition version SIM card to a Universal, DataMax, or DataMax eSIM SIM card, or upgrade a regular size SIM card to a micro-SIM card (for example, to use in an iPhones) then place your order online by selecting the product option on our Mobile Accessories page here. In the shopping cart you will be able to select your upgrade.

Unless otherwise noted, all phones sold on OneSimCard.com come with our standard 90-day replacement warranty. This warranty covers any mechanical defects, but does not include damage due to Acts of God, neglect, water damage, or other intentional or unintentional abuses of the phone. OneSimCard does offer extended warranties available for purchase.

We accept Visa, MasterCard, Discover, American Express and Bitcoin.

U.S. corporations can pay with company checks, ACH or wire transfer. No order will be processed until funds are cleared

For international customers with credit cards issued outside of the U.S. we require the order to be verified using the OneSimCard verification procedure. We do accept credit cards from most foreign countries.

Attention: Customers from the following countries must use Bitcoin option only (we will not accept credit cards as a form of payment): Congo, Egypt, Ghana, Lebanon, Nigeria, Pakistan, Palestine and Syria.

To make it simpler, you can deposit money into your OneSimCard Money Fund and then use the funds to make all purchases at OneSimCard.com including airtime recharges.

For Universal, Expedition, & eSIM World ONLY: Just dial 099 "Send" from your OneSimCard phone and in few minutes the balance will be displayed on the screen of your phone. Customers with iPhones can use OneSimCard Assist app to check balances and many other things.

You can always check your current balance by logging onto your OneSimCard account at www.onesimcard.com.

Your order will be shipped the next business day.

We offer several delivery options for shipments to the USA:

• USPS First Class Mail Package

Your order should arrive in 1-5 business days,Tracking is available for US deliveries. It is not available for international deliveries.

• USPS Priority mail
  Your order should arrive within 2-3 business days, but it is not guaranteed. You will be provided tracking details with this method
• UPS UPS Next Day Early.
  Delivery guaranteed by 10 AM or 3 PM.
• UPS 2^nd Day Air
  Delivery is guaranteed in 2 business days.
• UPS Next Day
  Next day delivery to most locations in the USA.
• UPS Next Day Saver

Next day delivery to most locations in the USA

• UPS Ground
  Delivery guaranteed in 1-6 business days depending on the destination from Boston, where we ship from.
• USPS Express Mail Large Envelope or Flat

1-2 business days

For orders shipped outside of USA:

• International Air Mail - usually takes 5 to 30 business days, no tracking
• US Postal Service International Priority - delivery time depends on the country
• UPS International - 2-6 business days - depends on the country and location in the country. This is the most reliable shipping option.

You will get more detailed information about the delivery to your destination when you start placing your order.

Any eSIM order does not require any shipping so this is a great way to avoid shipping costs and time. Just download and go!

Armenia, Austria, Belgium, Bulgaria, Canada, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gibraltar, Greece, Hungary, Iceland, Ireland, Italy, Kazakhstan, Latvia, Lithuania, Luxembourg, Malta, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Russia, San Marino, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom, USA and Vatican City

OneSimCard can help you save a lot of money on international roaming abroad over large domestic carriers. Check out these rate tables to compare international roaming offerings from AT&T, Verizon,  and T-Mobile. 

Yes. To reduce fraud and to protect you from over-spending, there is 30-day credit card spending limit set for each individual account. You will only be able to charge up to a certain amount during any 30-day period. You can see your current limit by logging in to your OneSimCard account and going to the Purchase History menu. There, you will find a Credit Card Authorization form available for download. If you would like to increase your monthly credit card spending limit, please download the Authorization form and submit it back to OneSimCard as instructed on the form.

We strongly suggest that you set your monthly credit card limit before going overseas as dealing with the form on the road can be much more difficult. 

Through a unique partnership with Viber, your primary OneSimCard number (+372) can be called free of charge for any Viber user! (requires activation and special dialing instructions, see below)

HOW: When this feature is activated, Viber users can call OneSimCard numbers for free by using a special dialing format +372800XXXXXXXX, where XXXXXXXX is the rest of the OneSimCard phone number after 372. For example, a OneSimCard user with the phone number +37212345678 should be called by dialing +37280012345678.

TO ACTIVATE: Log in to your OneSimCard account and go to the My SIM Cards menu. Scroll down to where it says "Incoming Viber Calls" and click Enable to activate this option.

COST: The call is free for the Viber user. The cost of receiving the Viber call is the same as receiving a call through a Personal Extra Number (PEN), i.e. the regular incoming call rate in the country you are in plus 20c/min. In countries with free incoming calls, like Italy or Japan, the cost will be just 20c/min.

PLEASE NOTE:

• When dialing in Viber, if Viber user chooses the Estonian country code in the menu then they should just dial 800XXXXXXXX because the +372 is added automatically.
• If the “free calls to OneSimCard from Viber” option is not activated for a particular OneSimCard number, when a Viber user dials +372800XXXXXXXX they will hear an automatic message: “The mobile phone is either switched off or out of coverage area.”

PLEASE NOTE: Viber is not available for the DataMax or DataMax eSIM