Comparison Pantech UML290 vs Pantech UML295

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	Pantech UML290	Pantech UML295
	from $9.96 up to $18.36 Outdated Product	from $29.96 up to $41.40 Outdated Product
all specs only differences
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Device type	USB modem	USB modem
Connection
Communication generation	2G 3G 4G (LTE)	2G 3G 4G (LTE)
Transmission technology	GPRS EDGE W-CDMA HSUPA HSDPA HSPA+ LTE EV-DO rev. A	GPRS EDGE W-CDMA HSUPA HSDPA HSPA+ LTE EV-DO rev. A
Ports	USB	USB
Features
External antenna connector
MIMO antenna connection
SIM card slot
General
Dimensions	89x58x10 mm	86x18x38 mm
Weight	62 g	48 g
Added to E-Catalog	january 2015	january 2015

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.