Comparison Alcatel IK40V vs ZTE MF825
Add to comparison |  |  |
|---|---|---|
| Alcatel IK40V | ZTE MF825 | |
| Outdated Product | Outdated Product | |
| TOP sellers | ||
| Device type | USB modem | USB modem |
Connection | ||
| Communication generation | 2G 3G 4G (LTE) | 2G 3G 4G (LTE) |
| 4G (LTE) | Cat.4 (150/50 Mbps) | Cat.4 (150/50 Mbps) |
| Transmission technology | GPRS EDGE W-CDMA HSUPA HSDPA HSPA+ LTE | GPRS EDGE W-CDMA HSUPA HSDPA HSPA+ LTE |
| Ports | USB | USB |
Features | ||
| External antenna connector |  |  |
| MIMO antenna connection | | |
| Memory card slot | | |
| SIM card slot | | |
General | ||
| Dimensions | 88x28x11 mm | 90x28.4x13 mm |
| Weight | 40 g | 60 g |
| Added to E-Catalog | april 2019 | january 2015 |
Compare Alcatel IK40V and ZTE MF825
You may be interested in
My comparisons
Alcatel IK40V often compared
ZTE MF825 often compared
Glossary
External antenna connector
The presence of a connector for an external removable antenna in the modem design. The meaning of all external antennas is described above; here we note that the connector makes it possible to use rather large antennas with the modem, which significantly exceed the capabilities of stock antennas (both internal and external non-removable ones). In addition, the user can choose the antenna at his discretion.
MIMO antenna connection
The ability to connect the MIMO antenna (the antenna itself, usually, must be purchased separately).
MIMO technology is used in Wi-Fi communications, as well as in 4G LTE networks (starting with Cat.2). Its general principle is to split the transmitted signal into several transmitting and receiving antennas; at the same time, each of the transmitting antennas broadcasts a signal to all receiving antennas at once (or at least to several of them). This format of operation allows more efficient use of the frequency range, increases the actual data transfer rate, and also increases resistance to interference. But antennas for MIMO are rather bulky, in the case of modems it is difficult to make them built-in; and such feature is required not so often. Therefore, separate external antennas are used to work with this technology.
Note that even in portable Wi-Fi hotspots (see "Type"), this feature is used exclusively for 4G/LTE; Wi-Fi connection is provided by built-in antennas.
MIMO technology is used in Wi-Fi communications, as well as in 4G LTE networks (starting with Cat.2). Its general principle is to split the transmitted signal into several transmitting and receiving antennas; at the same time, each of the transmitting antennas broadcasts a signal to all receiving antennas at once (or at least to several of them). This format of operation allows more efficient use of the frequency range, increases the actual data transfer rate, and also increases resistance to interference. But antennas for MIMO are rather bulky, in the case of modems it is difficult to make them built-in; and such feature is required not so often. Therefore, separate external antennas are used to work with this technology.
Note that even in portable Wi-Fi hotspots (see "Type"), this feature is used exclusively for 4G/LTE; Wi-Fi connection is provided by built-in antennas.