Advice and tips

How to unblock a SIM card, what are PIN and PUK codes

14.09.2021Adéla

Sometimes we manage to lock the SIM card in the phone and without it, the phone can only be used in limited mode. But what if we've long forgotten the PIN to unlock the SIM card? What is a PIN and what is it for?

The difference between roaming and international calls

31.03.2021Dominika

Do you know the difference between roaming and international calling? How do calls to and from abroad work? Knowing the difference is very important, because if you don't, you could be surprised by a high bill.

What to do if the SIM doesn't work (or won't register to the network)

02.02.2021Adéla

The SIM is an important element of a mobile phone, and is essential for using its functions such as making calls, sending SMS or surfing the internet. You may find that your mobile phone does not recognise the inserted SIM card and reports that an error has occurred. It doesn't have to be a SIM card fault right away, there are several solutions you can try for this problem.

How to unblock a SIM card, what are PIN and PUK codes

The difference between roaming and international calls

What to do if the SIM doesn't work (or won't register to the network)

Blog authors

Even better calls and internet

Advice and tips

How to unblock a SIM card, what are PIN and PUK codes

The difference between roaming and international calls

What to do if the SIM doesn't work (or won't register to the network)

Blog authors

Even better calls and internet

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