Does your SIM card no longer work? Perhaps it is damaged or faulty. You can check this yourself.
Switch off your mobile or tablet and check to make sure your SIM card is inserted correctly in your device. After that, switch your device back on.
If your SIM card still doesn't work, test the card in another device, if possible.
Does the SIM card still not work? In that case we will replace it free of charge in one of our points-of-sale. Did your employer provide your with a SIM card? Contact the person in charge within your company to replace your SIM card. You will of course keep your telephone number. You will be able to use your new SIM card on that same day, regardless of whether you exchange a SIM card, micro-SIM card, nano-SIM card or data SIM card.