Yes, it takes a "micro sd card". To insert it, just take off the back and put it in the green space next to your sim card.
There are many phones that are better than the Vodafone 543. Get yourself an iphone or an android
No
9076212
no
543
543 is not prime. 543 = 3 * 181
543
543
543 + 78900000 = 78900543
1 3 181 543.
198
87646555555555555553248777775813 + 543 = 87646555555555555553248777776356