Thinking aloud, you guys have invented inverter with locally available resource and there is a need for this product in Nigeria. Why don't you go commercial with is product. I am sure a lot of people will pay to have this item. You will be smiling to the bank and job will be created. I rather buy Made in Nigeria than Made in China. Just my 2 kobo.

Are you upgrading Memory or Hard Drive.
For memory, first check what you MB support and how many memory slots are available before spending your hard earn money in buying memory.
In most Laptop, you can install 40 GB hard drive.

Check the spec of your laptop for these information or check the manufacturers website.

Lateef :-

I don't quite understand your first question.

Yes, using GSM phone to browse is very slow compared to landline.