FREQUENTLY ASKED QUESTIONS

For Universal, Expedition, and eSIM World SIM cards, receiving calls is free in over 150 countries when received on your primary European phone number, including in most of Europe. To receive a call on your U.S. number or other Personal Extra Number, there is an additional per minute rate added. View all international cell phone rates.

If you receive a call through a Common Access Number or Personal Extra Number (such as a U.S. number) there is an additional charge of 20c/min. In countries with free incoming calls this would be your only charge per call.

For DataMax and DataMax eSIM card types, you can make and complete calls for a fraction of the cost of traditional cellular roaming (including on tablets) using the 1SIM VoIP App available on Google’s Play Store and Apple’s App Store:

Google Play: https://play.google.com/store/apps/details?id=org.onesimvoip&hl=en_US&pcampaignid=pcampaignidMKT-Other-global-all-co-prtnr-py-PartBadge-Mar2515-1

Apple App Store: http://itunes.apple.com/us/app/onesim-voip/id510371587

For Universal, Expedition, and eSIM World SIM cards,  all incoming SMS text messages are free to receive when received on your primary European number. Add 9 cent per SMS when receiving text on US or Canada PEN.

For DataMax and DataMax eSIM SMS messages are sent and received using the 1SIM VoIP App. The cost to receive SMS using the 1SIM VoIP App is $0.05 in most countries, The cost to send an SMS using 1SIM Voip App is $0.10 in most countries. See all rates on our international cell phone rates page.

Yes! Just select "nano size" or buy a 3-in-1 SIM that contains all 3 sim sizes during checkout.

1. There is online live chat at www.onesimcard.com available during normal business hours.
2. You can submit your support request or questions at http://www.onesimcard.com/contact-support/
3. You can call us 001-617-313-8888 during normal business hours. Keep in mind that when calling from your OneSimCard enabled phone this is not a free call. New! First 3 minutes are free when calling customer support from a OneSimCard enabled phone.
4. You can call from your OneSimCard mobile phone by dialing 096 then pressing Talk/Send. This is not a free call. New! First 3 minutes are free when calling customer support from a OneSimCard enabled phone.
5. You can submit your support request from your OneSimCard phone by sending a free SMS to 9111. We will review your question and will reply back with an SMS to your OneSimCard phone.

To make a call:

• Dial 00-CountryCode-AreaCode-Number and press the TALK/SEND button.
  Example: To call OneSimCard Support in the USA you would dial 00 1 617 3138888 and press TALK/SEND. 

With Europe & More, Univesal and eSIM World that do not use the callback to make a call, you will just get connected.
 
With OneSimCard Plus SIM or Expedition (formerly Data & Roam) SIMs:

After pressing the TALK/SEND button you will see a variable message on the screen (for example 'Wait for call') which you can ignore and your phone will ring back in a few seconds. Answer this ring as you normally would answer any incoming call. Your call will then be connected.

If you are unsure about how to properly dial an international number, follow this link for detailed country by country dialing instructions.

For Physical 3-in-1 DataMax, and DataMax eSIM cards, you can place calls using our low cost OneSIM VoIP service. OneSim VoIP costs much less than traditional voice roaming.

If your phone or SIM card is lost or stolen and automatic recharge is on, this could be a serious problem.

To prevent this, log in to your account and activate the option to block your service immediately after you notice your phone or SIM card is missing. You can find this option in the My SIM Cards menu. Your OneSimCard service for this SIM card number will be instantly blocked. The remaining balance on your lost SIM can be transferred to another SIM card on your account or you can order a replacement SIM card if you would like to keep your phone numbers from the lost SIM. However, the existing data package can’t be transferred to the new SIM card.

Alternatively, you can contact customer service online or call 001-617-313-8888 for assistance.

SMS messaging usually works without any additional setup of the phone.
In rare cases when there are issues sending or receiving text messages, please look at the following:

Problem with Sending SMS:

• Incorrect SMSC number (SMS Service Center Address) in handset settings.

SMSC number should be set as follows:

1. For Standard  and Plus OneSimCard SIM: +3725099000 for all countries except:

a. China:  +85290296747

2. For the Expedition (former Data & Roam) SIM as well as for Europe & More SIM: +37256100041

Special instructions for Apple Phones:

With Apple iPhones to check SMSC:

From the phone dialer Dial *#5005*7672# 

You will see the SMSC set currently on the phone. 

To change the SMSC on Iphone dial: 

Plus and Standard SIMs: **5005*7672*+3725099000# for all countries except China and **5005*7672*+85290296747# if in China.

Expedition (formerly Data & Roam) and Europe & More SIMs in any country: **5005*7672*+37256100041#

• NOTE: It is important to have the "+" symbol entered in front of the SMSC number.
• You can find locations of the Message Settings menus for different phone models here.

If your phone requires the name of Message Center Name enter: SMSC
SMS lifetime is short - must be at least 2 hours or set to Maximum settings.
Try sending SMS from OneSimCard menu

 Problem with Receiving SMS:

• Receiving Handset does not have enough free memory for incoming SMS.
• Receiving Handset was turned off or out of the coverage area during SMS lifetime set on the sending phone - usually 2 hours.
• Sender's SMS provider does not have an agreement with the receiving network.