Pe ecranul telefonului mobil apar numerosi indicatori care ne informeaza ce se intampla in spatele ecranului, indicatori pe care nu ii observam, sau cu care suntem atat de obisnuiti incat nici nu ne mai intrebam ce reprezinta si de ce sunt acolo – pur si simplu ne-am obisnuit sa ii vedem pe ecran.
Am gasit astazi o explicatie (in engleza – daca cineva dintre cei care citesc o traduce il rog sa puna traducerea intr-un comentariu) a simbolurilor care apar in iconul care indica conectarea la serviciul de date. Explicatia este urmatoarea:
H = HSPDA
3G = 3G (obviously)
E = EDGE
G = GPRS
The best is High-Speed Downlink Packet Access (HSDPA) which can go up to (on the Hero) 7.2Mbps if your provider supports it. Beyond that it can go to 42Mbps downlink and 84Mbps with Release 9 of the 3GPP standards, provided you have the right handset and are connected to the right provider that has all the hardware setup and installed (read no one).
3G isn’t actually a type of data transferal but actually a family of standards. Within this “family” you can get, through different data transfer types, speeds of up to 14Mbps on the downlink and 5.8Mbps on the uplink with HSPA+. I’m not sure WHY the phones put “3G” in the icon as it doesn’t tell you what type of data transferal method the phones using. They should either have “2G or 3G” and thats it or go specific and have “E, G, H” not mix them together.
Enhanced Data rates for GSM Evolution (EDGE) (also known as Enhanced GPRS (EGPRS)) can go up to 236.8Kbps.
General packet radio service (GPRS) normally provides data rates of 56-114Kbps.