What is the model of your Dell laptop?
Ok thanks. Please give me about 10min to investigate.
Your laptop should have a SIM card slot which should be visible when you remove the battery. Now, the SIM card works with the Wireless 5620 EVDO-HSPA card built in in your laptop when you want to utilise broadband for your Internet connection. It is claimed on the Dell website that some broadband service providers may require a SIM card and some may not. Yours probably may have never worked because it requires a SIM card.
Details on the card are here: http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l=en&s=corp&sku=313-9362#Overview
As you never use it, I do not think there would be any harm in disabling it if possible
Its is useless indeed sometimes. It is for in case you do not want to carry your mobile wifi router around for example, you would take out the SIM card and slot it in the laptop instead.
Just like you I have never used it in my laptop as well.
Thank you so so much. I do think the system has some technical problems today I did observe some myself. You may try again any time later.
Thank you so much once again.
Have a great weekend.