Funda umehluko phakathi kwemigangatho ephezulu yeselula
Xa ukhetha isicwangciso senkonzo yeselula esilungileyo kumphathi wakho ozikhethelayo sisigqibo esibaluleke kakhulu, ngokunjalo ukhetha umphathiswa wenkonzo yeselula kwindawo yokuqala. Uhlobo lwethekhnoloji umphathiswa osebenzisayo lenza umehluko xa uthengela ifowuni.
Eli nqaku libonisa ukungafani phakathi kwe- GSM , EDGE , CDMA kunye ne- TDMA .
GSM kunye neCDMA
Kwiminyaka, iindidi ezibini zobuchwepheshe befowuni-i-CDMA ne-GSM-zidibeneyo. Oku kungahambelani sisizathu sokuba ezininzi ze-AT & T zingayi kusebenza kunye nenkonzo yeVerizon kunye nakwi-vice versa.
- Ababoneleli benethiwekhi ye-GSM bafaka ulwazi lomthengi kwikhadi leSIM elikhutshwayo. Oku kwenza kube lula ukutshintsha iifowuni; uthabatha i-SIM khadi ngaphandle kwefowuni yakho endala kwaye uyifake kwi-yakho entsha. I-GSM iteknoloji yandalala eYurophu. Hlanganisa le nyaniso ngefowuni ngeSIM ekhutshweyo, kwaye unomnxeba ongayisebenzisa ngaphesheya kokutyelela ngeenguqu ze-SIM.
- Iifowuni ze-CDMA zinakho okanye zingenayo i-SIM khadi, kodwa ulwazi lomsebenzisi lugcinwa kunye nomnikezeli wesevisi, omele unike imvume yayo ukuba utshintshe ifowuni. Iifowuni ze-CDMA mazicwangciswe kunye nabo bonke abasebenzisayo. Nanini na xa ushintshela abathwali, ifowuni kufuneka isetyenziswe kwakhona kweso sithuthi-nokuba ingaba ifowuni evuliwe.
Impembelelo yoLwazi lweNethwekhi kwiMgangatho
Umgangatho wenkonzo yefowuni ayinanto yokwenza ngeteknoloji umniki. Ubunciko buxhomekeke kwintanethi ngokwawo kunye nendlela umnikeli awenza ngayo. Kukho intanethi ezilungileyo kunye ezingenjalo-ezintle kunye ne-GSM ne-CDMA iteknoloji. Unokukwazi ukufikelela kwiinkxalabo ezinobuncwane ngamanethiwekhi amancinci kunezona zikhulu.
Kuthiwani NgeeMfono ezingavulwa?
Ukususela ngo-2015, bonke abathwali be-US bafuneka ukuba bavule iifowuni zabo kumthengi emva kokuba bazalise isivumelwano sabo. Nokuba unqumle ukuba ifowuni yakho ivuliwe okanye uthenge ifowuni entsha evuliwe , mhlawumbi i-GSM okanye i-CDMA ifowuni entliziyweni, kwaye ungayisebenzisa kuphela ngababoneleli benkonzo. Nangona kunjalo, ukuba nefowuni evuliwe kukunika uluhlu olubanzi lwababoneleli ngeenkonzo. Awunamkhawulelanga omnye.
01 ngo 04
Yintoni i-GSM?
I-GSM (iNkqubo yeSizwe yonxibelelwano yeThafone) yitheknoloji yefowuni esetyenziswa kakhulu emhlabeni, eyaziwayo kuma-US nakwamanye amazwe. Abathwali beefowuni ze- T-Mobile kunye ne-AT & T, kunye nabanikezeli baninzi bamaselula, sebenzisa i-GSM kumanethiwekhi abo.
I-GSM yinkcubeko ephathekayo ephathekayo e-US, kodwa inkulu nakwamanye amazwe. I-China, iRashiya ne-Indiya inabasebenzisi befoni be-GSM abangaphezu kwe-US Kuqhelekileyo kumanethiwekhi e-GSM ukuba ahambe amalungiselelo kunye namazwe angaphandle, oko kuthetha ukuba iifowuni ze-GSM zikhethwa kakuhle kubahambi bamanye amazwe. Kaninzi "
02 we 04
Yintoni EYIPHAKATHI?
I-EDGE (IiNtlawulo zeNgcaciso zeDatha ye-GSM Evolution) ziphindwe kathathu ngaphezu kwe-GSM kwaye zakhiwe kwi-GSM. Yenzelwe ukufumana imidiya yokusakaza kumadivayisi eselula. I-AT & T kunye ne-T-Mobile zinamanethiwekhi ase-EDGE.
Amanye amagama kwi-teknoloji ye-EDGE iquka i-GPRS ephuculweyo (i-EGPRS), i-IMT-Single Carrier (IMT-SC) kunye neeNkcukacha zeNkcukacha eziQinisekisiweyo ze-Global Evolution. Kaninzi "
03 we 04
Yintoni i-CDMA?
I-CDMA (iCandelo loLwazi loLwazi oluPhezulu ) lukhuphisana ne-GSM. Sprint, Virgin Mobile, kunye neVerizon Wireless basebenzisa i-standard CDMA ye-teknoloji e-US, njengabanye abanikezeli bamaseli amancinci.
Xa amanethiwekhi e-CDG ye-3G, eyaziwa nangokuthi "i-Evolution Data Optimized" okanye "EV-DO" amanethiwekhi, aqala ukukhishwa, awakwazi ukudlulisa idatha kwaye enze iifowuni ngexesha elifanayo. Kwiimeko ezininzi, ngokukodwa nabanikezeli bamaseli abane-network ye-4G LTE, loo ngxaki ithe yaqwalaselwa ngempumelelo. Kaninzi "
04 we 04
Yintoni i-TDMA?
I-TDMA (iCandelo leeNkcukacha zoLwazi oluPhezulu), elidlulela phambili kwi-GSM ye-teknoloji ephezulu, ifakwe kwi-GSM. I-TDMA, eyayiyinkqubo ye-2G, ayisasetyenzisiwe yizithuthi ezinkulu zeenkonzo zefoni ze-US. Kaninzi "