First some basics:
Am not going to start from the telephone... (but here is its history, for those interested)
2G networks:
-- basically meant for voice traffic - usually TDMA or GSM type of networks
2.5G:
-- GSM: typically enhanced for data via GPRS - which allows -- generally true throughput ~ 54 kbps (irrespective of reports of 125+kpbs) - at 125 kpbs - 1 mb file would take 90 seconds to download
-- GSM: EDGE, the so-called "2.75G" does offer upto 384kbps, but thats asymmetric, with 100 kpbs on the uplink side.
-- CDMA: typically around 50kpbs - with a burstable option upto 144kbps.
3G:
-- built for 1's and 0's -- but not a full IP stack - something like at the ethernet level - to adopt a networking stack paradigm
-- GSM: avg speed 800kbps -- 14 sec download for 1 mb file -- provided it supports HSDPA/USUPA - otherwise, you're looking at 384k sysmmetric.
-- CDMA: typically 155kbps at 1xEV-DO -- going upto 1.8mbps with Rev A
4G (as per LTE):
3G + QoS services + full multimedia support + full-IP-Stack support (AIPN) built-in + support for other interesting things like femtos, etc.
-- GSM: expect twice the speed of 3G (~ 1.5 mbps -- should take 7 seconds to download a 1 mb file) - even though people claim upto 50 <b>m</b>bps.
-- CDMA: ~ 27mbps
(for the sake of simplicity - am not getting into 5G and 6G, just yet)
A 3G pulse test was conducted in the US across the major telcos. Report here
Summary:
Verizon ~ avg 951 kpbs d/l - with good reliability and consistent speed in 89.8 test cases
Sprint 3G ~ avg 808 kpbs d/l - with 90.5 % reliability in test cases
AT&T ~ 812kbps d/l - with 660 kbps upload and 68% reliability - although they claim to be the fastest 3G provider in the US
-- Overall - signal strength indicators did not positively correlate with quality of connection
-- Verizon is generally fast and consistent.
-- Tap Sprint on the West coast.
Am not going to start from the telephone... (but here is its history, for those interested)
2G networks:
-- basically meant for voice traffic - usually TDMA or GSM type of networks
2.5G:
-- GSM: typically enhanced for data via GPRS - which allows -- generally true throughput ~ 54 kbps (irrespective of reports of 125+kpbs) - at 125 kpbs - 1 mb file would take 90 seconds to download
-- GSM: EDGE, the so-called "2.75G" does offer upto 384kbps, but thats asymmetric, with 100 kpbs on the uplink side.
-- CDMA: typically around 50kpbs - with a burstable option upto 144kbps.
3G:
-- built for 1's and 0's -- but not a full IP stack - something like at the ethernet level - to adopt a networking stack paradigm
-- GSM: avg speed 800kbps -- 14 sec download for 1 mb file -- provided it supports HSDPA/USUPA - otherwise, you're looking at 384k sysmmetric.
-- CDMA: typically 155kbps at 1xEV-DO -- going upto 1.8mbps with Rev A
4G (as per LTE):
3G + QoS services + full multimedia support + full-IP-Stack support (AIPN) built-in + support for other interesting things like femtos, etc.
-- GSM: expect twice the speed of 3G (~ 1.5 mbps -- should take 7 seconds to download a 1 mb file) - even though people claim upto 50 <b>m</b>bps.
-- CDMA: ~ 27mbps
(for the sake of simplicity - am not getting into 5G and 6G, just yet)
A 3G pulse test was conducted in the US across the major telcos. Report here
Summary:
Verizon ~ avg 951 kpbs d/l - with good reliability and consistent speed in 89.8 test cases
Sprint 3G ~ avg 808 kpbs d/l - with 90.5 % reliability in test cases
AT&T ~ 812kbps d/l - with 660 kbps upload and 68% reliability - although they claim to be the fastest 3G provider in the US
-- Overall - signal strength indicators did not positively correlate with quality of connection
-- Verizon is generally fast and consistent.
-- Tap Sprint on the West coast.
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