ZTE MF821 4G LTE USB Modemis a new 4G LTE Surfstick from ZTE, it’s also called Telstra Pre-Paid USB 4G, which allows you to download data at speeds up to 100 Mb/s (LTE) under 4G and 3G UMTS up to 28.8 Mb/s (HSPA + MIMO).
With connection with additional micro SDHC card, ZTE MF821 allows you to use the modem as a USB memory up to 32 GB. As the sister model, ZTE MF820 4G LTE USB Modem supports 1800/2100/2600MHz, one more 4G band supported than ZTE MF821.
More and more mobile broadbands available on the market with HSPA+ technology, today, we overview the HSPA+ USB Modems and 3G routers available or unavailable for users’ reference.
Option iCon 505 +: The iCon 505 + option is presenting its first HSPA + surf stick. It delivers up to 21.6 Mbit/s downstream and up to 5.76 Mbit / s upstream.
Huawei B683: This is the first “real” HSPA+ router from Huawei. He is the successor of the Huawei B970b (Speedport HSPA) probably hit the market in mid-2011 and support HSPA + at 28.8 Mbit/s downstream. HUAWEI B683 is, like its predecessor for stationary use on grid provided, making it perfect as a DSL replacement modem. Read reviews for Huawei B683 3G Router.
Huawei E182E (E1823): This stick is one of the first of its kind, it was presented in February 2009 at MWC and was used by the Telekom Germany , A1 Telekom Austria, Orange Austria, T-Mobile Austria (Web Stick Pro) Entel in Chile, Bell Mobility and Telus in Canada. But for T-Mobile, the model E1823 incorporates the new hardware revision. Technically, it has mastered all HSPA and HSPA + standards with up to 28.8 Mbit/s downstream, and upload of 5.76 Mbit/s can be achieved. It supports the UMTS frequencies 2100/1900/900/850MHz and quadband GSM. An external antenna connection is available.
Huawei E1820: This is the little brother of the E182E, it has the same specifications except for the detail that it only supports the 2100MHz UMTS band. The stick is from O2 for the pilot test in Munich and used by Hutchison 3 on österreichen and Swedish markets. The device has an external antenna connection.
Huawei E1831 : The device will be sold by T-Mobile in the U.S. market. HSPA + download speed is achieved in up to 21.6 Mbit/s. The upload is at 5.67 Mbit/s.
Huawei E270 : The UMTS modem is the first device for HSPA+. It was in 2009, the start of the world’s first HSPA + network in Austria available at A1. In the download is 21.6 Mbit / s (28.8 Mbit/s for an update) and 5.67 Mbit / s upload. The modem is no longer marketed by A1. As the successor to the sets A1, a UMTS stick Huawei E182E..
Huawei E352: Download With up to 28.8 Mbit / s in the UMTS network with HSPA + and upload up to 5.76 Mbit / s, which is not a problem for this stick. The E352 is with Telekom in Germany as “web’n’walk Stick Fusion 3” available. .
Huawei E372:Huawei E372 HSPA+ 42Mbps USB stick is not yet widespread, but this may well come. Because the surf stick belongs to the top class: it supports dual-carrier HSPA + with MIMO antenna technology, allowing download speeds of up to 42Mbit/s and upload speeds of up to 11Mbit/s are possible.
Huawei E392: This stick can achieve both on LTE network to 100Mbit/s in the downlink and DC-HSPA + in the UMTS network with up to 42Mbit/s downlink. And it has many branch models, such as HUAWEI E392u-12, HUAWEI E392u-21, HUAWEI E392u-22, HUAWEI E392u-92, HUAWEI E392u-6, HUAWEI E392u-9, HUAWEI E392u-511. You could more details on HUAWEI E392 4G LTE USB modem.
Huawei E397: This HUAWEI E397 4G Surfstick can work on both LTE to 100Mbit/s in the downlink and DC-HSPA + in the UMTS network with up to 42Mbit/s downlink and 11 Mbit/s in the uplink. It has many branch models such as HUAWEI E397Bu-501, HUAWEI E397Bu-7, HUAWEI E397u-53, HUAWEI E397u-56, More about Huawei E397 4G USB Modem .
Huawei E398: This HUAWEI E398 4G Surfstick of absolute high-end model is from Huawei, it’s similar to HUAWEI E392 and E397 with branch models, supporting LTE network to 100mbps and dual-carrier HSPA+ with MIMO antenna technology and download rates of up to 42Mbit/s and upload speeds of up to 11Mbit/s. The model is available from Telenor and Tele2 Sweden, shortly in Austria with A1. A new version with extended frequency support is coming in the summer, the extended versions K5005 is for Vodafone and Telecom to Germany. More to learn about HUAWEI E398 4G LTE Surfstick.
Huawei E587 : This device is a mobile Wi-Fi hotspot and supports dual-carrier HSPA+ with MIMO antenna technology, allowing download speeds of up to 42Mbit / s and upload speeds of up to 11Mbit / s are possible. Review for HUAWEI E587 42Mbps mobile WiFi hotspot .
Huawei K4605: This stick K4605 is available in Germany and many other European countries such as Spain, Holland, Greece, Italy and the UK by Vodafone and is technically perfect solution for HSPA+. For detailed of the K4605, clieck HUAWEI K4605 .
ZTE K4505-Z (MF668): Caution, in case of confusion! Also this model is sold by Vodafone (currently in England and Germany), but it is only in name with the Huawei related. In addition, the stick is sold as MF668 with Rogers in Canada. It has an external antenna port and supports UMTS on Frequenzen850MHz, 1900MHz and 2100MHz and quad band GSM. A slot for microSD card is also included.
ZTE K4605-Z: These sticks represent the successor to the K4505. Besides a new design has been improved, the power: thus now with dual-carrier HSPA + and MiMo antennas up to 43.2 Mbit / s downstream and 11 Mbit / s upload speed possible.
ZTE MF680 : With speeds of up to 42Mbit/s download and up to 5.76 Mbit/s upload, it’s a fantastic surf stick. Made possible by the DC-HSPA + technology, an extension is to work on HSPA+ services. The stick is currently sold in several countries in Europe, for instance in Greece and the provider Hutchison 3 in Sweden. Check more details about ZTE MF680 3G HSPA+ Surfstick.
ZTE MF820: An LTE USB Surf Stick, also dominates the UMTS (3G) and GSM (2G) The model is able to use almost all supported LTE frequencies and is used worldwide. Buy from Summer 2011 at Telenor in Sweden, now it’s available. Check more details about ZTE MF820 4G USB Stick.
Vodafone K4510 and K4511: Both sticks can be up to 28.8 Mbit/s for downlink via HSPA+ and they come with a connector for external antenna.
Vodafone K5005 : This is the Vodafone version of the Huawei E398 and therefore sparks except LTE network in the UMTS network via DC-HSPA + with up to 42Mbit / s downstream and up to 11 Mbit / s upstream. Click here for the article: Vodafone K5005 .
Sierra Wireless 306/307: These two sticks only differ in the frequencies of the 306 Stick is designed for the North American market and the 307 for Europe. Both versions support. It’s available for Movistar in Spain and Telus in Canada.
Sierra Wireless 308/309: These two drives are the second generation of HSPA + sticks of company Sierra Wireless and are thus the successor models of 306er and 307er sticks. Technically, according to Sierra Wireless has not changed the design and appearance, an antenna connection is available,
Sierra Wireless AirCard 312U : This is the first HSPA+ Stick Sierra Wireless, which speeds up to 42Mbit/s is supported. It will initially be sold only by Telstra in Australia. More details about this modem Sierra Wireless 312U Aircard .
Novatel Wireless Ovation MC545 : Besides the Ovation MC996D, the MC545 with Movistar (Telefónica) is also offered. It is the first unit of the company’s HSPA+ with up to 42Mbit/s, downstream and HSUPA with up to 11Mbit/s. At the same time Ovaton MC545 is the flagship. As a special feature, the device has dual-carrier HSPA+ to support. More details about Novatel Ovation MC545.
Novatel Wireless Ovation MC996D: Movistar (Telefonica) sold these HSPA+ Stick recently in Spain. Novatel’s first HSPA+ Stick transmits both the 900MHz and 2100MHz in the region and supports speeds up to 21.6 Mbit/s downstream and up to 5.76 Mbit/s upstream.
Novatel Wireless Ovation MC998D: Another HSPA+ Stick from Novatel Wireless, the frequencies of 850, 1900 and 2100MHz HSPA+/UMTS network could be supported. In the GSM network transmits the drive with quad band technology. Since the stick has MiMo antennas are in the download up to 28.8 Mbit/s and upload speed up to 5.76 Mbit/s The device is offered by the Canadian service provider Bell Mobility and SaskTel Mobility, as well as in Israel Pelephone.
Nokia CS-18 : The Finns offer surf sticks with HSPA+ capability, it is advertised in the CS-18 with download speeds of 21.6 Mbit/s and upload speeds of 5.76 Mbit/s. The stick is now sold by Rogers in Canada.
Nokia CS-19 : The big brother of the CS-18 offers download speeds of 21.6 Mbit/s and upload speeds of 5.76 Mbit/s.
Since 4G Technology is becoming more and more known, most people may know TDD or FDD, but may not know the difference between the two technology clearly. It’s obevious that FDD LTE network is more commonly deployed and launched to commercial. So what’s the advantage of FDD-LTE 4G network?
Before we introduce the compare TDD and FDD, let us simply introduce the communication system. Depending on whether two sides could simultaneously transmit data, there exist three transmission techniques:
First one is Simplex, which means one party transmits to the other party; the other party can only receive it and can’t transmit data simultaneously. There is only one frequency spectrum used. The traditional radio(non-interactive) and television is just this communication method.
Second one is Half Duplex, which means both party in two sides could transmit and receive data, but not at the same time. There is only one frequency (channel) used, but there are two ways. Walkie-talkies or other two-way radio systems are this communication method application.
Third one is Duplex, which means both party in two sides could transmit and receive data simultaneously, The communication is two-way and two frequencies (channels) are used – one for transmitting and one for receiving.
From above introduction, it’s clear that Duplex is the most efficient communication system. The providers all over the world upgrade their network from 2G GSM to 3G UMTS, and now to 4G LTE or WiMAX, which is just to improve the communication efficiency. That’s why the 4G LTE FDD and TDD were born.
FDD, the abbreviation of Frequency Division Duplexing, stands for the communication is done on only one frequency, but the transmitting and receiving data are at different time. This method of communication is using Half Duplex system.
TDD, the abbreviation of Time Division Duplexing, stands for the communication is done on two independent frequencies and the transmitting and receiving data are simultaneous. It’s typical Duplex communication system.
The advantage of TDD could obviously come into reflect when the uplink and downlink data transmissions are not symmetrical. A typical disadvantage of TDD is the need to use guard periods between the downlink and uplink transmissions. So if downlink and uplink are both busy, TDD may great pressure for data transmission.
The advantages of FDD are typically observed in situations where the uplink and downlink data transmissions are symmetrical (which is not usually the case when using wireless phones). More importantly, when using FDD, the interference between neighboring Radio Base Stations (RBSs) is lower than when using TDD. Also, the spectral efficiency (which is a function of how well a given spectrum is used by certain access technology) of FDD is greater than TDD.
In fact, the two LTE versions TDD and FDD are very similar, just the physical layer are different. So the UEs could support both of TD-LTE and FDD-LTE with only one chipset, which can come true based on only minor modifications. So the mobile broadband with the chipsets below will be able support both LTE TDD and FDD.
ST-Ericsson (M700/M710 chipsets)
Altair Semiconductor (FourGee-6150 chipset)
Qualcomm (MDM9200/MDM9600 chipsets)
And per the official information, HUAWEI E392 and E398 are both the UEs which could support TD-LTE and FDD-LTE model. But with different version, some of them may only support single version.
FDD is an older scheme that was best suited for applications, such as voice, that generate symmetric traffic, while TDD is best suited for bursty, asymmetric traffic, such as Internet or other datacentric services.
* In TDD, both the transmitter and receiver operate on the same frequency but at different times. Therefore, TDD systems reuse the filters, mixers, frequency sources and synthesizers, thereby eliminating the complexity and costs associated with isolating the transmit antenna and the receive antenna. An FDD system uses a duplexer and/or two antennas that require spatial separation and, therefore, cannot reuse the resources. The result is more costly hardware.
* TDD utilizes the spectrum more efficiently than FDD. FDD cannot be used in environments where the service provider does not have enough bandwidth to provide the required guardband between transmit and receive channels.
* TDD is more flexible than FDD in meeting the need to dynamically reconfigure the allocated upstream and downstream bandwidth in response to customer needs.
* TDD allows interference mitigation via proper frequency planning. TDD requires only one interferencefree channel compared with FDD, which requires two interference-free channels.
* In summary, TDD is a more desirable duplexing technology that allows system operators to receive the most from their investment in spectrum and telecom equipment, while meeting the needs of each individual customer.
According to the most recent report of LTE network status from GSA, total 42 operators over the world had commercially launched LTE 1800Mhz as their next generation LTE network spectrum. Some of them may set this single band or as a part of multiple band deployment. In the total 113 commercial LTE networks, the band 1800 occupies 37%, which let it become the most popular and most commonly commercial LTE band.
And we also get the the spectrum of 1800Mhz is now available in follow 29 countries: Angola, Australia, Azerbaijan, Croatia, Czech Republic, Denmark, Dominican Republic, Estonia, Finland, Germany, Hong Kong, Hungary, Japan, Latvia, Lithuania, Mauritius, Namibia, Philippines, Poland, Portugal, South Africa, Saudi Arabia, Singapore, Slovak Republic, Slovenia, South Korea, Tajikistan, UAE, and UK.
It would be lucky for those people who had a 4G USB Modem, 4G WiFi Router, 4G Tablet or 4G Smartphone, because if they go to these countries, they just need to change their SIM card, they can easy enjoy the local 4G Service. Of course, they have to make sure their devices are unlocked. Here now most of the 4G broadband could find unlocked one in the market.
In this case, what’s the best 4G USB modem and 4G WiFi Router for band 1800Mhz? It’s a good question for those who usually go to different countries, this information help them to get devices for commonly use.
Per the past market record, HUAWEI and ZTE sales of 4G LTE terminal leads the 4G era. And the two Chinese vendors released the most 4G gadgets. Unlike 3G USB modem or 3G Router, 4G modem and 4G Router are not in high price range because very few people feel urgent to use 4G broadband to get 4G speed, the production of these broadband in low level. And the current economy depression slower down the promotion of 4G.
Now we back to the question, what is the best 4G USB modem for spectrum 1800Mhz? The writer think to give options is better to give decision, HUAWEI is the world top telecom equipment supplier and their modems and routers are stable functions, but its competitor ZTE is also not bad, with the reliable quality, ZTE can offer comparatively better price than ZTE. Just like to choose a smartphone between Apple and Samsung, if you want more fashion and more cool, choose Apple, but if you concern more about the price, SAMSUNG may be a better choice.
Regarding the 4G Router, it seems HUAWEI E589 4G Pocket WiFi and ZTE MF91 4G Pocket WiFi Router are perfect, but per our investigation, Sierra Wireless released its 4G pocket WiFi Router in large quantity, it’s now selling at lower price, Sierra Wireless 760s and 762s 4G LTE Mobile Hotspot. People can take them into consideration.