Is there a difference between SIM card and memory card? What are TF cards and SD cards? What memory card is suitable for Tianyi 3G mobile phone?

Is the capacity in a mobile phone the capacity of a card with a phone number? No, there is also the storage space (rom) that comes with the mobile phone.

SIM card can be used as a mobile phone card.

What are TF cards and SD cards? Tf card is called t-flash, also called microSD card. Therefore, tf card is small and sd card is large, not referring to the space size of memory card, but the area size. Generally speaking, tf card is called memory card.

What memory card should be configured for this purpose? If there are two card slots, it is not dual card dual standby, but a mobile phone card and a memory card.

So what are CDMA and GSM? It is a communication network, CDMA is telecommunications, GSM is mobile, and Unicom is WCDMA.

As for the memory card, it can be used as long as it is the same size as the card slot, but some of it can't be used, such as my classmate's N86, so my memory card can't be used. Because 86 does not support microHCSD. There are restrictions on the size of the mobile phone, such as the maximum support. ...

Other brands of memory cards, such as Kingston, Sandisk and PNY, can meet the model? Generally speaking, it is ok, as long as the card slot corresponds. Other issues are also explained in the previous paragraph. Of course, there are compatibility problems!

I'm slow at typing. I've been typing for ten minutes.