3G
3G is the term used to refer to the information systems 3rd generation mobile (Third Generation). It allows mobile users to transfer both voice data and external voice data (download data, send emails, messages, images, sounds,...).
3G systems require a radio access network is completely different than 2G systems. The strength of this technology than 2G's technology allows transmission and reception of data, audio, image quality for all fixed subscribers and subscribers are moving at different speeds. With 3G technology, the supplier can bring to customers multimedia services, such as high-quality music; quality video images and digital television; The Global Positioning Service (GPS), E-mail, ...
Advantage:
+ Used to be everywhere.
Where do with electromagnetic waves, there have 3G 4G internet access.
+ Suitable for customers with low demand
+ Very suitable for travel and tourism.
+ Response online services : internet access, online applications, online learning...
Disadvantage:
+ Sharing bandwidth with other subscribers. When multiple subscribers with access speed will be reduced.
+ Unstable speeds that depend on subscriber location, 3G 4Gbase stations and signal strength the phone (sometimes very low)
+ High cost. Since there is no package. You will pay a very high fee for the hobby watch videos or listen to music.
4G
If we had used 2G, 3G, now 4G mobile network
means 4thgeneration mobile ( Fourth
Generation ). With transfer rates
many times higher than the 3G networks of up to 1.5 Gbps maximum, 4G network
suitable for the needs of entertainment, video calls anytime, anywhere.
Many people would think that 4G and 4G LTE network is one,but absolutely not.
The 4G network provides that when using smart phones to access the internet at
speeds of 1Gbps (fixed) or 100Mbps (when moving quickly) to be considered 4G
network standard. And 4G LTE
(Long-Term Evolution) is a wireless standard higher than 3G but not with 4G. If
your device does not achieve the above-mentioned threshold speed, which is
higher than the 3G network, your network is only 4G LTE only.
However, 4G LTE network still offers faster transfer speeds than 3G, so you can still satisfied with the device only supports 4G LTE for 4G LTE network is currently considered the standard network connection current fastest wire without a net, device meets 4G standards.
Currently, the most pocket wifi hotspot are using mobile network 3G or 4G LTE. And most countries have pocket wifi hotspot for rent, including Vietnam.
Y54U is the rental service of portable WiFi hotspot. It is the similar WiFi coverage with mobile networks in VietNnam in terms of using mobile data via a mobile SIM card. It provides easy access to the Internet via WIFI for up to 5 people simultaneously.
Unlimited 3G/4G Internet 
Share with your family and friends
Easy to use