General Maintenance Mobile

Free Tutorials For Servicing Your Cell Phone... And More

Nokia Lumia 630

The most common cause of this issue on the device is the use of a nano sim card with an adapter.

If you have been using a nano sim inserted into a micro sim adapter, in most cases the sim card will fit into your device and it will read and work fine. However when the sim card is removed, it will catch on the pins of the sim card reader. If force is used to pull the sim card out this will also damage the pins.

If the device shows the following message whilst your sim card is inserted in the device, it means your reader is damaged.

SIM error – The SIM card is missing or invalid. You can still make emergency calls if your mobile operator supports this.


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Nokia Lumia 820

The most common cause of this issue on the device is the use of a nano sim card with an adapter.

If you have been using a nano sim (iPhone 5 sim card) inserted into a micro sim adapter, in most cases the sim card will fit into your device and it will read and work fine. However when the sim card is removed, it will catch on the pins of the sim card reader. If force is used to pull the sim card out this will also damage the pins.

If the device shows the message ‘Sim Card Error’ ‘No Sim’ etc it means you have a problem with your sim card reader.

We can fix this problem for you.


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Nokia Lumia 920

Below is a Nokia Lumia 920 with a sim card inserted however the device is not reading the sim card, it says Sim Error. The Sim Card is missing or invalid. You can still make emergency calls if your mobile operator supports this.
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Blackberry Passport

Here is a basic guide to show you the process involved in replacing the sim card reader on the Blackberry Passport SQW100-1. Model RGY181LW

The picture below shows that the sim card reader connector is damaged if you look closely you can see that the pins are missing or damaged.

For testing purposes we are going to insert a known working sim card from another device into here and see what happens when the phone is powered on. It is now powered on and the phone shows SIM NOT DETECTED. This means that the phone is not recognising a sim card.

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Blackberry Z10 & Q10

This guide will help you understand why your Blackberry Z10 or Q10 is not detecting your micro sim card.

The most common cause of this issue on the device is the use of a nano sim card with an adapter.

If you have been using a nano sim (iPhone 5 sim card) inserted into a micro sim adapter, in most cases the sim card will fit into your device and it will read and work fine. However when the sim card is removed, it will catch on the pins of the sim card reader. If force is used to pull the sim card out this will also damage the pins.

Here is a basic guide to show you how to replace the sim card reader on the Z10 or Q10. Both of these devices use the same sim card reader so the process is exactly the same.

Disassembly videos are readily available on youtube for both devices so we will not be showing you how the device is taken apart.


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