Payments acceptance

Never the less, for some devices, an Acquiring Service Provider can allow payment acceptance by manually entering the card number (PAN). For more information, see here.

Preparing to accept payments

Before you start to accept payments, make sure that:

Trusted Device Criteria

Amount Entering

On the Amount entry screen, type in the required payment amount and confirm it by clicking the PAY button

Before to accept payments, we recommend to find out and learn current limits on:

  • the amount of a one-time payment

  • the amount of payment when the Application requests the PIN from a cardholder

  • daily amount of payments

You can get this information from your Acquiring Service Provider.

Payment card tapping

When you see on the screen the request to tap a card, ask a customer to tap a ​ 💳 card or a ​ 📱 mobile device on which the payment application is installed to your ​ 📱 device, to the location of the NFC module.

For better card reading, you should bring it as close to the location of the NFC module on the device as possible and hold it until it is read in full. Possible locations of the NFC module can be found below.

The result of the complete reading of a card is confirmed by lighting up of four color indicators

After that, the card can be removed from the device.

Where to bring the payment card

Below there are examples of some possible locations of an NFC module. But only you can find out the exact location of it on your device. For example, read the specific section in the user guide to your device that describes operations with the NFC.

For such 💪 practice when finding the NFC module location, you can:

  • take an expired card and try to complete several Payments by entering the minimum amount allowed,

  • if you have no such card, you can use a valid card, and try to accept Payments with the minimum amount allowed and then (in case the payments have been successful) you can cancel transaction.

All NFC modules are mainly located on the back of devices.

The location of the NFC module for Samsung mobile devices can be found here.

🆘Unsuccessful Card Reading

In case when the payment card reading failed, you will receive a corresponding information message, which may contain the following codes: 1926, 1943, 1976

The main reasons why the payment card is not successfully read in may be the following:


Recommended actions

NFC module is not activated

Go to the settings of your device and enable the NFC function. If you have a choice between paying with "sim" or "e-wallet" when activating the function, then you should choose "e-wallet"

Application has no permissions for NFC

Open the system menu, in the section with the applications list find the tapXphone application and make sure that in the Application permissions the access to NFC is allowed

The card is not brought to the NFC module location

Find the location of the NFC module in your device where the strongest antenna signal for reading cards is detected

The payment card was removed too early

Ask your client to bring the card and do not remove it until the result of a successful reading of the card is displayed on the screen. For more details see here

The client’s card has very low signal in process of contactless payments

As experience has shown, very often some cards have a weak signal of the internal antenna. In such a situation, you can try to tap the card with the other side, while maintaining the minimal distance between the microchip and the NFC module.

If the card cannot be read in, suggest that the customer use another one

Payment card that is used does not have a contactless interface

Payment card of an unsupported payment system is used

Make sure that the payment card belongs to a payment system that is supported by your payment terminal.

The NFC module does not work

Install a third-party application that can be used to read regular NFC tags. Run it and try to read the NFC tag/any contactless card (but not card of your client).

There are objects that block the signal between the device and the payment card

Remove items that may affect the processing of the payment card. For example, the device case.

Any repeated attempt to use the payment card must begin with removing it from the field of action of the NFC module of your device and re-bringing it to it.

PIN entering

The Application may ask the customer to enter PIN code if the payment amount exceeds the limit for no-PIN transactions set by your Acquiring Service Provider. This is a prerequisite for verifying the cardholder in order to confirm the transaction.

When the PIN entry screen appears, allow your customer to enter PIN on your device.

Pay attention of your customer to the fact that in order to safely enter the PIN code a virtual keyboard is used in which the buttons are arranged in random order and have different sizes.

Client verification via signature request

Payment Result

Upon successful processing of the transaction and confirmation of the completed payment by your Acquiring Service Provider, the Application will offer you to use the function of sending/displaying the receipt to your customer.

The Application's receipt is not a fiscal receipt.

If the customer does not need the receipt, you can start a new transaction by clicking the New Purchase button.

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