iSocket Is Suitable For Prepaid SIM Cards

Posted (or last update) , by Denis Sokol

UPDATE: Read our FAQ here. Below is the old article. You may find some information from this article useful though.


This is a re-post of old articles that have changed because of updates in the mobile world. I have split this article into several different posts. Here I tell basic information about the use of prepaid SIM cards in iSocket. Sometimes these cards called PAYG or Pay-As-You-Go cards. If you are from USA or Canada, read this post about specific for SIM cards for USA and Canada. The information below will be useful for you too.

You must disable any voicemail or call-forwarding services for your subscription or prepaid card! Please ask your mobile operator for help if necessary.

Some users have approached us about problems with prepaid cards. We have tested the device with prepaid cards of various operators in different countries. A common problem is that the device does not send a reply nor call back to the user when using prepaid cards. The explanation is simple: You have not activated your prepaid card!

For USA and Canada the customer activation process may be different from described in the next paragraph. Please read my post here.

Some cards require activation by a call to customer support. If you insert one of these cards into the iSocket, the device will receive messages and incoming calls and will be able to execute commands, but you will not receive any responses. The problem is not with the device. If you were to insert the same card (new, but not yet activated) into your mobile phone and try to send an SMS, you will also get an error message. Please read the instructions for the prepaid card carefully and activate it, using your mobile phone. After you have activated the card, it can be used in iSocket.

Some prepaid cards require to be preset to accept calls and select the support service language required. Do this using your mobile phone according to the instructions for the prepaid card. You can then use the card in your iSocket.

You must disable any voicemail or call-forwarding services for your subscription or prepaid card! Please ask your mobile operator for help if necessary.

Note too that some prepaid cards do not allow you to send SMS’s at all, because this is not included in the tariff. If this is the case with your prepaid card, then iSocket will also be unable to send SMS’s. Check whether you can send SMS via your mobile phone with the same prepaid card.

Sometimes, prepaid cards have pre-stored numbers (for example the number to customer service). In very rare cases this can interfere with the normal operation of the phone. You can quite safely remove these numbers from the SIM-card without doubts. This can be done using your mobile phone.

Remember also to disable the PIN-code request. The POWER LED will indicate by specific blinking if you have not done so (see User Manual for the device). Disable PIN-code security using your mobile phone. If you have not done so and you turn on the unit three times you might have to reset the SIM-card PIN-code using the PUK-code.

To sum up: Activate your prepaid subscription according to the instructions, disable any voicemail or call-forwarding, ensure that you have sufficient credit on the SIM-card, disable PIN code security and the card can then be used in your iSocket.

Which is better? - prepaid or subscription (contract) service?

It is entirely up to you! A prepaid card, for example, might be convenient because you can buy it quickly and do not need to sign any contracts. From a financial point of view, there are no particular recommendations. Although prepaid cards have no monthly fee, it does have a validity period from activation or last recharge. If you don’t plan to use the device frequently, the limited validity period may be inconvenient. Read the terms of use carefully when buying a prepaid card.

On the other hand, some mobile operators provide contracts with a low monthly fee. If you choose this alternative you do not need to worry about the validity period. This small monthly fee could prove more economical and convenient for you.

Most but not all prepaid cards, and in some cases contract SIM cards, will be deactivated by the operator if you do not use it. They usually require to make at least one call or send at least one SMS during a certain period. To prevent deactivation of the SIM card for this reason you can send a message to the iSocket at least once a month or configure scheduler to send it for you. You also can request a call back from the iSocket unit. See more information about these features in the user manual for your iSocket.

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