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SIP2SIM Voice mobile SIM service

Putting you in control of your office mobile

The SIP2SIM service is a very simple concept which provides you with control of your mobile communications. It is ideal for an office of any size and even for more technical home users.

The service consists of a SIM card, which you put in a mobile phone and it makes that phone appear as if it is a SIP extension (e.g. SIP phone) on a phone system of your choice.

Not a SIP applicationIt is important to realise that we are not talking about a SIP application on a smart phone which then uses mobile data or WiFi. With this service your mobile phone is working as a mobile phone on the GSM mobile network making and receiving proper mobile voice calls. The SIP part is what we do in the back end to pass the calls to and from your SIP server.
Voice SIM

An extension on your office phone system

The basic service allows you to specify, on our control pages, the server name, login and password for a SIP server. This could be your office phone system whether an asterisk box, or a FireBrick or whatever. As long as it handles normal UDP SIP with G.711 a-law audio then we will register as a phone and allow calls both ways.

This means your phone can simply be an office extension, like any other.

  • Call office extensions using short extension numbers from your mobile phone.
  • Office policies on callable numbers, such as premium rate, enforced like any other extension.
  • Office voicemail system working, just like any other extension.
  • Office call logging, just like any other extension.
  • Office call recording, just like any other extension.
  • Use in hunt groups, just like any other extension.
  • Even use features like call steal to transfer calls if you want, or in-band DTMF to control call transfer and related features if your SIP server supports that.

Manage costs

The costs are very simple for using the SIM in the UK on O2. Higher costs apply for roaming SIMs, even roaming to other UK networks.

  • £5+VAT to purchase the SIM card.
  • £2+VAT pcm once activated (activates on first use).
  • 2p+VAT per minute for calls either way.
  • 2p+VAT per text either way.
  • 2p+VAT per MB for data usage either way.
  • No minimum term - just monthly rolling contract.

Calls are charged per second, and data per kilobyte (min 6kB per data session). Charges apply to the SIP2SIM service separately from any charges you may have for text or voice calls using your VoIP/SMS provider.

The SIP2SIM service is not a service that allows calls to telephone numbers in the national dialling plan. It allows calls to be passed to a VoIP/SIP gateway of your choice. Any ability to make calls to normal telephone numbers is provided by that VoIP provider (which may be our VoIP service). As such, special rules on costs of 01, 02, 03 numbers, rules on 0800 numbers being free, and rules on charges for other special and premium rate numbers do not apply to the SIP2SIM part of the service. The cost of the SIP2SIM service applies regardless of the number you dial.

Telephone numbers

Mobile numbers Whilst the SIP2SIM service does not have a telephone number as such, it can connect to our existing VoIP service (or other VoIP providers). We now offer not only all UK area codes but also UK mobile phone numbers which can be new or ported in from an existing mobile. These new or ported-in mobile numbers can also be ported out (ask sales for a PAC). You can connect such a mobile number to your SIM card, and route text messages as well, just like a normal mobile, if you wish - or if you prefer, route the calls via your own phone system, and use SIP2SIM as a telephone extension from that system.

Just like a SIP handset, the service does not come with any sort of telephone number.

You can, if you wish, have the phone register on a VoIP provider's service. This would mean you get calls to a number operated by the VoIP provider, and can make calls from that number, just like any other SIP phone. If registered with your own telephone system, it would have internal extension numbering, and even direct dial in numbering as you have chosen to configure on your phone system.

There is no question of porting numbers to or from the service, it has no numbers.

We can, of course, provide telephone numbers as part of our VoIP service if you wish, and we can even pre-configure these to connect with your SIM as part of the order process.

International roaming

The SIMs are available with world wide roaming. Costs are higher when roaming, obviously. The following are charges for use within EU. See full roaming price list for more details.

  • £5+VAT to purchase the SIM card.
  • £2+VAT pcm once activated (activates on first use).
  • 10p+VAT per minute for calls either way.
  • 5p+VAT per text either way.
  • 10p+VAT per MB for data usage either way.
  • No minimum term - just monthly rolling contract.

In the UK and rest of EU, calls are charged per second, and data per kilobyte. Charges apply to the SIP2SIM service separately from any charges you may have for text or voice calls using your VoIP/SMS provider.

UK roaming for the best coverage of the UK

Previously we have been able to supply a SIM that can roam to other networks in the UK. This dual profile SIM has a profile to use O2 in the UK normally, but switch to an EU profile when no O2 signal. The result is much better UK coverage overall. These older SIMs will continue to work like that. However, from Sep 2016 we will be supplying dual profile SIMs that do not roam to other UK networks. They work in the UK on O2 only, and switch to other networks outside of the UK using an EU profile. Bear in mind that the EU only SIMs will roam on to UK networks but at the higher price.

The usage pricing depends on the profile in use at the time. On the O2 profile, which only works on O2 in the UK, the O2 UK prices apply. On the EU profile (even if on a UK network, as our older SIMs can do) the EU pricing applies.

Roaming in UKWe appreciate that the older O2/EU SIMs were very useful allowing use of the EU profile in areas of the UK where there was no O2 signal. We hope to have some new SIMs available later in 2016 which will work in a similar way, but on a different base UK network. Watch this space...

Text

Texts are operated separately. Our text interface using HTTP can send texts to the phone, and texts from the phone can be posted to an HTTP gateway of your choice. If you have an A&A VoIP telephone number then texts can be associated with that number directly (not all of our numbers ranges can handle inbound texts).

Mobile Data

Data currently allows simple NAT, unfiltered, Internet access. We hope to offer data via A&A in the future.

Technical details

We have a comprehensive list of technical details and restrictions in the knowledge base article.

Third Party SIP services

The service involves entering SIP registration details in to our control pages. Where these are the details of your own SIP server such as an office phone system, you can make the decision as to whether or not you trust us with those SIP details in order to provide the SIP2SIM service. We will, of course, use all reasonable skill and care to ensure the details remain confidential and are not disclosed.

We have, however, designed the service so that it can work with a wide variety of third party SIP services, not just in the UK but in various countries. There are a lot of unusual systems out there and we continue to work to ensure that such services operate with SIP2SIM. However, using third party SIP details may well be in breach of your terms with the third party SIP provider as it means giving us your SIP details. It is up to you to check the terms and we would not suggest anyone breaks a contract they have. You may find that the provider is happy to trust us, especially if they do any other work with us, so it is worth asking. We are also happy to discuss contracts with other providers for the SIP2SIM service and we may be able to provide them with branded SIMs to sell to their customers.

Unfortunately we cannot guarantee that the service will always work with all other providers, and whilst we aim to resolve any technical issues (with reference to the standards), if a provider simply will not deal with our service and blocks us there is little we can do.

Ordering SIMs

BrandingOur voice and data SIM cards are ideal for a corporate network or for a wholesale customer to set up their own mobile service.

We can offer branding with professional quality SIM printing and pre-set settings.

More...
SIP2SIM UK O2 Voice SIM

The SIP2SIM service makes your mobile work like a SIP device connected to a SIP phone system or VoIP provider of your choice. It can also be supplied pre-configured to an A&A VoIP number making your mobile work like a normal mobile phone but with a landline style number. This SIM is single profile and works on O2 in the UK only.

Order voice SIMs

Prices (ex VAT). Buy SIM £5.00.
Ongoing charges £2.00 pcm
Calls 2.00p/min
Texts 2.00p
Data 2.00p/MB

SIP2SIM O2/EU Roaming Voice SIM

The SIP2SIM service makes your mobile work like a SIP device connected to a SIP phone system or VoIP provider of your choice. It can also be supplied pre-configured to an A&A VoIP number making your mobile work like a normal mobile phone but with a landline style number. This SIM is dual profile allowing use of O2 in the UK and switching to an EU profile throughout the rest of the world.

Order voice SIMs

Prices (ex VAT). Buy SIM £5.00.
Ongoing charges £2.00 pcm
Calls (O2) 2.00p/min (EU) 10.00p/min
Texts (O2) 2.00p (EU) 5.00p
Data (O2) 2.00p/MB (EU) 10.00p/MB
See roaming prices.

SIP2SIM EU Roaming Voice SIM

The SIP2SIM service makes your mobile work like a SIP device connected to a SIP phone system or VoIP provider of your choice. It can also be supplied pre-configured to an A&A VoIP number making your mobile work like a normal mobile phone but with a landline style number. This SIM is fixed on the EU roaming profile, so does not use the lower O2 pricing even when using O2 network.

Order voice SIMs

Prices (ex VAT). Buy SIM £5.00.
Ongoing charges £2.00 pcm
Calls 10.00p/min
Texts 5.00p
Data 10.00p/MB
See roaming prices for usage outside UK/EU.


We did this before?

Yes, we had a very similar service via Three UK, and they pulled the plug. The telco offering us this service is doing so as part of a much wider well established product that they sell to many people for other purposes, and so we feel much more confident that this service will not vanish suddenly.

Anyone that had the old service with us will be able to obtain one of the new SIMs free of charge instead of £5+VAT for the SIM when we launch.