Which of the following acronyms does not refer to mobile communication?

HSDPA
EDGE
SMART
UMTS
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology; often written as SMART) is a monitoring system included in computer hard disk drives (HDDs), solid-state drives (SSDs), and eMMC drives. Its primary function is to detect and report various indicators of drive reliability with the intent of anticipating imminent hardware failures.
Ninjai
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Very interesting!
reach: rather globalcomputerstechnicaltechnology

Answers by country

HSDPA
EDGE
SMART
UMTS
answers
flagGreece
6%
12%
81%
0%
16
flagAustralia
19%
23%
52%
4%
21
flagPoland
18%
17%
51%
12%
1759
flagGermany
19%
26%
43%
10%
94
flagIndia
18%
20%
42%
16%
59
flagSwitzerland
46%
7%
38%
7%
13
flagthe United Kingdom
39%
12%
34%
14%
41
flagthe United States
27%
29%
30%
12%
65
flagAustria
25%
30%
30%
15%
20
flagPakistan
10%
30%
20%
40%
10