onyxcard Prepaid MasterCard^® international phone card Top Up FAQs

This service allows you to make very cheap international calls from your mobile or landline with no need to set up an account. The service operates on a pre-pay basis and calls are made using the available credit.

Simply go to www.theonyxcard.com/xxxxxx and fill in your details in order to buy £5 or £10 of International call credit. Once we receive billing confirmation we will text your mobile with your PIN worth £5 or £10 of international call credit along with the local and free phone access numbers.

It is very simple and further details will be sent to you by SMS to your mobile phone.

1. Dial any of the access numbers (0208/ 0800)
2. Enter your PIN (no need to enter PIN if you call from the mobile you topped up with)
3. Dial your destination Number (00 + Country Code + National Code + Telephone Number)
4. To make another call, dial * at any time

This service allows you to make very cheap international calls from your mobile or landline with no need to set up an account. The service operates on a pre-pay basis and calls are made using the available credit.

Simply text ONYX to 80556 for a £5 call credit. The £5 credit will be charged to you by your mobile phone provider. Once we receive billing confirmation we will text you with your PIN worth £5 of international call credit along with the local and free phone access numbers.

It is very simple and further details will be sent to you by SMS to your mobile phone.

1. Dial any of the access numbers (0208/ 0800)
2. Enter your PIN (no need to enter PIN if you call from the mobile you topped up with)
3. Dial your destination Number (00 + Country Code + National Code + Telephone Number)
4. To make another call, dial * at any time

Yes, our billing is per minute.

Yes, you can dial the access number from any landline or mobile phone and then enter your PIN when it asks you to do so.

Yes, but there will be a surcharge of 10p per minute when using a 0800 access from a BT public payphone. This rate is in line with the industry norm.

When you make your call you will hear a voice prompt which will advise how much credit is left.

Generally a confirmation message is sent instantaneously, however very occasionally for example at peak times the mobile networks maybe congested which means that the confirmation message maybe delayed. Do not resend the message as you will be charged twice.

There is no administration or subscription fees. There is however a 0800 surcharge of one pence per minute from any international mobile or landline and a 10p per minute surcharge from a payphone. A connection charge equal to the rate per minute for the relevant destination is charged on each call. A disconnection charge between one to twenty pence may apply to each successful call.

Just check our rates page for up to date information.

Yes, you can Top Up once a day with £5 or £10. From your mobile phone you can Top Up by texting ONYX to 80556 up to 4 times (£20) a day.

Yes, your calling credit will expire 90 days after the last Top Up was made.