Cac nuoc va cac he thong the dien thoai khac nhau tren toan cau.

[@LDV]

Xin chao cac ban-nhung nguoi yeu thich phonecard.

Ngay truoc toi suu tap tem. Ngay nay toi chi focus 2 de tai thoi de de choi va co thoi gian hon. Tem suu tap tu tem chet sang tem song va dan dan toi nhan thay qua tem chung ta hieu biet duoc nhieu, tuy nhien do gi han thoi gian danh cho cong viec, toi nhan thay phong trao suu tap tem phonecard xuat hien tu nhung nam nam 1980's va lan dan -phat trien manh tren the gioi do no moi tre-de suu tap-de bao quan va it ton kem thoi gian cham soc hon, nen toi bat dau suu tap phonecard va cang ngay cang yeu thich no, vi no khong doi hoi minh nhieu.
Tuy nhien, khi qua nhieu nam suu tap phonecard, toi nhan thay phonecard co nhieu loai the(hay noi cach khac no co nhieu he thong khac nhau ma nguoi suu tap can nam bat). nhan day toi xin dan dan viet bai de gioi thiau cac ban cac he thong khac nhau de cac ban co duoc thong tin 1 cach day du va ngan gon de nho.


Toi xin cung cap thong tin cho c ac ban co ban ve cac he thong the Dien Thoai tren toan cau. Xin tom tac gom 13 loai nhu sau: (theo thu tu ABC)
1. Alcatel.
2. Anristsu.
3. Autelca.
4. Chip.
5. GPT.
6. GSM.
7. Inductive.
8. Landis and Gyr(L&G).
9. Magnetic.
10. Remote memory.
11. SIDA
12. Tamura
13. Urmet.

Toi se tuan tu viet bai ve chi tiet cua tung loai the khac nhau. Xin cac ban don doc.