Tag nrho cov smartphones yuav nkag mus rau hauv Web, tiam sis tsis yog txhua tus tuaj yeem ua rau tib qhov ceev. Qee cov xov tooj ntawm tes yuav zip ntawm qhov chaw mus rau qhov chaw, daus cov ntaub ntawv hauv ib lub eeb, hos lwm tus neeg zoo li muaj kev ceev ceev dua ib qho kev sib txuas thaum laus.
Kua iPhone, piv txwv li, tuaj yeem nkag tau hauv AT & T's HSDPA network ; Kua hais tias nws tsis kam koom nrog HSDPA vim hais tias cov chipset tsim nyog yuav tau kos lub zog ntau dhau, txo roj teeb lub neej.
Yog high-speed cov ntaub ntawv kev ceeb toom rau koj, nco ntsoov tias lub xov tooj koj xav tau kev pab txhawb lub 3G network. Thiab nco ntsoov nug yog tias koj tuaj yeem sim cov xov tooj thiab cov kev pabcuam 3G ua ntej koj ua daim ntawv cog lus ntev, lossis rov qab yog tias koj tsis txaus siab rau nws qhov kev ua tau zoo. Nco ntsoov: Qhov ceev ceev yuav txawv.
Koj yuav ua li cas nco ntsoov tias koj lub xov tooj yuav muab qhov Web site browsing ceev? Ib qho ntawm cov teeb meem loj tshaj yog cov ntaub ntawv network uas koj lub xov tooj txhawb nqa-thiab lub network uas koj lub xov tooj ntawm tes xa tuaj. Ib lub vev xaib 3G, los yog peb lub xyoos, cov ntaub ntawv network yuav muab ceev tshaj plaws. Tsis yog txhua tus tes hauj lwm 3G yog tsim muaj sib npaug, tab sis. Txhua lub cellular cab kuj muaj nws tus kheej network (lossis tes hauj lwm), thiab muaj ntau yam tsis muaj nyob hauv txhua qhov chaw.
Ntawm no yog ib qho kev qhia txog qhov kev siv technology ntau heev.
Tsis yog txhua tus xov tooj sib txig sib luag:
Koj lub cab kuj tuaj yeem muab kev sib txuas lus rau cov ntaub ntawv ceev ceev, tiam sis tsis tag nrho nws cov xov tooj tuaj yeem nkag tau cov kev pab cuam sai. Tsuas yog cov handsets - cov neeg uas muaj lub tshuab chipset nyob sab hauv-ua tau li ntawd.
Ib lub network 3G yog lub lag luam hauv xov tooj ntawm tes, muab xov xwm ceev ntawm tsawg kawg yog 144 kilobits ib zaug (Kbps). Kev sib piv, kev sib txuas lus hauv Internet ntawm lub computer feem ntau muaj kev ceev txog 56 Kbps. Yog tias koj puas tau zaum thiab tos kom ib qhov Web site mus download tau ntau tshaj qhov kev sib txuas lus, koj paub tias qeeb li cas.
3G tes hauj lwm muaj peev xwm muaj cua ceev ntawm 3.1 megabits ib ob (Mbps) los sis ntau dua; uas yog nyob rau hauv nrog speeds uas muab los ntawm cable modems.
Nyob rau hauv ib hnub-rau-hnub siv, li cas los xij, qhov tseeb ntawm 3G network yuav txawv. Tej yam xws li cov teeb liab lub zog, koj qhov chaw, thiab cov kev sib tshuam hauv network tuaj rau hauv kev ua si.
T-Mobile lags Behind:
Tam sim no, T-txawb tsuas yog txhawb nqa lub 2.5G NTGE network. Tus neeg tsav tsheb npaj yuav xa ib qhov 3G network, nrog rau kev pabcuam siab HSDPA kev pab, tom qab lub caij ntuj sov no, txawm li cas los xij. Nyob twj ywm.
AT & T Cov Kev Pab Cuam:
AT & T muaj peb tes hauj lwm "high-speed": EDGE, UMTS, thiab HSDPA.
Lub EDGE network , uas yog cov ntaub ntawv network txhawb los ntawm thawj lub cim iPhone, tsis yog muaj tseeb 3G ntaub ntawv network. Nws yog feem ntau hu ua 2.5G network, nrog ceev uas tsis pub tshaj 200 Kbps.
UMTS qhov kev pabcuam muaj siab txog 200 Kbps mus rau 400 Kbps, nrog rau qhov tawm mus tshaj tawm txog 2 Mbps. Nws yog ib qho kev pab cuam muaj tseeb 3G nrog ceev uas dhau cov EDGE network.
Sprint Nextel thiab Verizon Wireless:
Sprint Nextel thiab Verizon Wireless ob qho tib si txhawb EV-MEEJ koom tes. EV-Ua yog luv rau Evolution-Data Optimized thiab qee zaus yog hu ua EvDO los yog EVDO. EV-Ua yog muab rau kev ceev ceev ntawm 400 Kbps rau 700 Kbps; raws li nrog rau lwm cov tes hauj lwm 3G, qhov kev hloov ceev sib txawv.
Qhov sib txawv ntawm EV-DO cov kev pabcuam muaj los ntawm Sprint Nextel thiab uas muaj los ntawm Verizon Wireless yog tsawg. Kev ceev yog piv, tiam sis txhua tus neeg nqa khoom muaj kev pab nyob hauv cheeb tsam me ntsis.
Saib Daim Ntawv Qhia Kev Them Nqi Kho Mob thiab Daim Hom Phiaj Ntawm Txoj Kev Pab Them Nqi Kho Mob (Verizon) cov lus qhia ntxiv txog kev siv network.
HSDPA yog tus ceev tshaj plaws ntawm cov vas nthiv tes hauj lwm. Nws yog sai heev uas nws yog feem ntau hu ua 3.5G network. AT & T hais tias lub network yuav ntaus speeds ntawm 3.6 Mbps mus 14.4 Mbps. Kev kub siab tshaj plaws hauv lub ntiaj teb no feem ntau qeeb qeeb tshaj qhov ntawd, tab sis HSDPA tseem yog ib lub vas nthiv super-ceev. AT & T kuj hais tias nws lub network yuav ntaus speeds ntawm 20 Mbps hauv 2009.
Yog xav paub ntxiv txog lub network muaj, mus saib AT & T daim ntawv qhia kev pabcuam.