The modem module we are currently using is a GSM/GPRS module - the
SIMCOM SIM908. This is a quad band module, so compatible with
everywhere. Very nice, and works well, but I am aware that the
global cellular providers are moving away from 2G and long-term
this may be a problem.
The replacement SIMCOM module seems to be SIM5320. But, the
frequencies seem more complex. Frustrating as we don't need the
3G speed - but we do need the frequency compatibility.
There appear to be three variants of the module:
- SIM5320A
Dual-Band UMTS/HSDPA 850/1900MHz
Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz
* FCC
* PTCRB
- SIM5320E
Dual-Band UMTS/HSDPA 900/2100MHz
Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz
* CE
* GCF
* ICACA
- SIM5320J
Dual-Band UMTS/HSDPA 850(800)/2100MHz
Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz
* Telec
* JATE
From the certifications, I'm guessing SIM5320A is USA and
SIM5320E is Europe.
There is also
SIM5218,
which appears to have similar features but is
tri-band UMTS/HSPA850/1900/2100 or UMTS/HSPA 900/1900/2100 as
well as GSM/GPRS/EDGE 850/900/1800/1900. It is more expensive
and twice the size of the SIM5320.
- SIM5218A
Tri-Band UMTS/HSPA850/1900/2100 MHz
Quad-Band GSM/GPRS/EDGE 850/900/1800/1900
• CE
• FCC
• ROHS
- SIM5218E
Tri-Band UMTS/HSPA 900/1900/2100MHz
Quad-Band GSM/GPRS/EDGE 850/900/1800/1900
• CE
• FCC
• ROHS
- SIM5218C
Single-Band UMTS 2100MHz
Quad-Band GSM/GPRS/EDGE 850/900/1800/1900
- SIM5218J
Tri-Band UMTS/HSPA800/1900/2100 MHz
Quad-Band GSM/GPRS/EDGE 850/900/1800/1900
• Telec
• JATE
From my limited research, it seems AT&T is using 850 and
1900, Three in UK is using 2100.
Anyone know what the major carriers around the world use?
What about the ones you are using now?
Regards, Mark.
P.S. By comparison, the iPhone5 is MTS/HSPA+/DC-HSDPA (850,
900, 1900, 2100 MHz); GSM/EDGE (850, 900, 1800, 1900 MHz); LTE
(2 variants, with a few bands each).
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