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22/04/2013

What’s the difference between ZTE MF880 and ZTE MF820S2?

As one of the 4G LTE modems from ZTE, the TDD modem ZTE MF820s2 may not be well known because it's born for China Mobile 4G LTE networks. ZTE MF820s2 looks very similar to ZTE MF820, they are using the same appearance module, but inner parts are completely different. ZTE MF820 is for FDD network while MF820s2 works for TDD & FDD.    

 

There is another 4G TD-LTE modem ZTE MF880, which is also FDD compatible. Today, we will have a look at what's the difference between ZTE MF820s2 and MF880.    

 

Frequency Bands    

 

Frequency band should be the key difference between similar 4G modems, even though some modems looks almost the same. The frequency band decides where could work or not, and which operators they could support. ZTE MF820s2 supports FDD 2600MHZ and TDD 1900/2300/2600MHz. The band 1900MHz is a special band that very operator has chose as their 4G network spectrum. So many other 4G modems could replace ZTE MF820s2 if the band 1900MHz is not a must frequency. ZTE MF880 could also support TDD 2300/2600 MHz, but it cannot work with band 1900MHz. As a TDD and FDD surfstick, ZTE MF880 also supports FDD800/2600MHz. So when users don't require modem to support 1900Mhz, ZTE MF880 could fully replace MF820s2.    

 

4G LTE Speed    

 

As standard 4G USB modems, ZTE MF880 and MF820s2 both supports the TDD and FDD network. However, under the two technologies, the data transmission rates are different. When working on FDD network, the peak download speed could reach 100Mbps while upload speed up to 50Mbps. But if on TDD networks, maximum download speed could reach 68Mbps and upload speed could reach 17Mbps. By the way, the speeds are only theoretical speeds. In real practice, the network can't be perfect as we wish; the link speeds may vary time to time.      

 

External Antenna and MicroSD card  

 

It's a pity that both ZTE MF880 and MF820s2 both don's have connector for external antenna. And we didn't find any place to plug the MicroSD card. So they couldn't use as flash memory card.      

 

USB Design   ZTE MF880 and MF820 are both under design of 2D USB design. The USB is rotatable for 270 degrees. This design will help users to use more space when plug to PC.    

 

We can't make conclusion that which is better. They are in same brand and could meet different requirements from users or operators. So it would be better to know more about the difference between similar models. If you want to check more 4G LTE modems, welcome to land www.4gltemall.com  

27/03/2013

Difference between HUAWEI E3251 and Vodafone K4605

Huawei E3251 DC-HSPA+ USB Stick is the new 42mbps USB dongle in 2012 from Huawei, it is the upgraded model from Huawei E372 3G USB Stick. Today we will have a look at this high speed 3G dongle.

   

 

Actually, there is another model Vodafone K4605 USB Surfstick which is also from Huawei E372. Vodafone K4605 is the high speed data card customized by the world's top operator Vodafone. K4605 is used for European customers. Except for the logo difference, Vodafone K4605 supports higher HSUPA speed up to 11mbps, while the upload speed foe Huawei E372 is 5.76Mbps. The upload speed of K4605 is almost twice faster than E372.

 

   

 

They both support the 42Mbps download speed with the DC-HSPA+ technology. But Vodafone K4605 could support only the 3G UMTS 900/2100MHz, which is available in Europe. Huawei E372 could support Qual-band for 3G UMTS/WCDMA 850/900/1900/2100 MHz, so Huawei could support any WCDMA operators anywhere.      

 

Then here comes Huawei E3251 USB Stick. It's in completely different system. Huawei E3251 is the new member for Huawei HiLink USB surf stick. As we introduced before, HiLink USB modem is very user-friendly, no extra driver needed, no installation and setup. It's really plug and play USB dongle. Huawei E3251 could also support up to 42Mbps Data rates, unlike Huawei E372, it has many sub-models, such as E3251s-1, E3251s-2, E325s-6. They are configured to support different bands in many areas or countries.  

 

 

We are glad to find all the three models have external antenna connector. Many customers has the demand for high speed, especially in remote areas, the external antenna is very important. Now all of them are SIM unlocked on www.4gltemall.com , which one will you buy if you need a high speed data card?  

20/03/2013

HUAWEI E3276 4G LTE Category 4 USB Surfstick Review

Today, we get the demo of Huawei E3276 4G LTE cat4 USB Surfstick. If we say 2012 is the beginning year of 4G LTE, 2013 should be the beginning of 4G LTE Category 4. LTE Category 4 develops from 4G LTE (also called LTE Category 3) and is more efficiency in data transmission. It could support 50% faster speed than 4G LTE Category 3 with peak download speed up to 150Mbps on FDD network. What amazing speed!  

 

 

The Huawei E3276 Cat4 LTE modem is the successor of Huawei E398 and E397, which are LTE category 3 USB modems. Huawei E3276 has been presented to public by many 4G operators all over the world. The Huawei E3276 we get is in white color, no operators' logo. It's in Huawei logo without original package box.

 

HUAWEI E3276    

 

The total design of Huawei E3276 is very cool, in vertical direction; it looks like a burning fire. On the front of Huawei E3276, there is Huawei Logo and beside logo, there is a LED indicator to tell users the connection status.

 

   

 

Just like Huawei E398, the Huawei E3276 is also in rotatable USB design, the difference between them is the there is a cap to stuck the USB for E3276, press the button, the USB could auto eject, so it's somewhat like the USB design of Huawei E397, but Huawei E398 doesn't have this feature.

 

   

 

The USB could be rotated to 2D total 180 degrees. It’s a user friendly design because it will save much space when connecting this dongle to PC, and it would help to get better signal strength.  

 

     

 

On the back of Huawei E3276, there is a stick, on which, we could see the model number Huawei E3276, Certificate information and place of origin.

 

   

 

At the below side of Huawei E3276, we could see the MicroSD card slot covers by a plastic cap. Open it, we can see there is a external antenna connector with the slot. And the other connector for pigtail is at another hole.

 

     

 

Push the back over towards to the direction to USB, the back cover could be removed from the body, and then the inner part could be seen. The Module of inner part is in plastic material, there is SIM card slot in the module. Above the module, there is the model nuber, IMEI number of Huawei E3276, and the S/N number. The model number is HUAWEI E3276s-150.

 

 

 

We get the information that HUAWEI E3276s-150 support 4G LTE FDD 800/2600MHz and 3G UMTS 900/1900/2100MHz with 2G GSM qual band 850/900/1800/1900MHz backward. And it has its partner model HUAWEI E3276s-151.  

 

In conclusion, the design of HUAWEI E3276 is cool and we believe the LTE cat4 dongle would give reliable high speed support for the users. Next time, we will have a test report for HUAWEI E3276 in near future.