We are here to help you get answers to your questions about OneSimCard phones and services.
How do I make a call using OneSimCard global cell phone service?
To make a call:
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.
How do I set up SMS text messaging on my phone?
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:
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#
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:
How can I dial '+' on my phone when making call?
Note: You can always dial 00 instead of + when making outgoing calls. For example, to reach OneSimCard customer service in the USA you can just dial 001 617 3138888.
You should consult the phone manual for this info. Different manufacturers have specific ways to access the '+' key, so make sure you know yours.
Here are few known ways:
How should I send an SMS to get charged only 15 cents per text message?
There are two ways for SMS message to be sent:
Bear in mind that sending SMS messages to the abbreviated special SMS destinations like voting, music downloads, etc. will cost you $9.00 per message.
This does not apply to DataMax SIM cards.
How do I recharge using 1SIM Fund?
How can I contact customer support?
There are a number of ways you can contact customer support.I can't send SMS from my iPhone
There is a known bug with iPhone phone book. If you are trying to text to a contact that is entered in the phone book, and the contact is not entered in proper international number format, the SMS will not go through even if you just enter the number in the SMS menu directly and properly.Does iPhone Hotspot work with OneSimCard?
Yes. All unlocked iPhones' Hotspot feature works with OneSimCard SIM.Do I need to change any settings on my phone when going abroad?
Not Really. If you are planning to use Mobile Data, you will need to enable Data Roaming on your phone. Everything else in modern phones get done automatically. However, you should ensure that the APN on the device is correctly updated when the SIM card or eSIM card is enabled.Universal, Expedition, & eSIM World SIM card types:
Name: 1SIM
APN: send.ee
Leave all other settings alone
DataMax, DataMax eSIM, & IoT Track SIM card types
Name: 1SIM (NOTE: Most IoT devices do NOT have a setting/field for “Name”)
APN : OSC (NOTE: The “O” is the LETTER O, NOT the number 0)
Leave all other settings alone
Can I pay with PayPal?
No. We no longer accept PayPal for individual accounts. PayPal is still available for payment on Corporate accounts though.© 2006-2026 Belmont Telecom Inc., DBA OneSimCard.com. All rights reserved