Most in the industry expect 5Gwill be up and running by 2020 and earlier this year Ericsson began testing out a new 5G device on the streets of Stockholm, Sweden and Plano, Texas.
According to Fortune, Ericsson's 5G prototype is so big because it is still a testbed designed to be used as a tablet, smartphone or PC.
The can reach speeds of 2 Gbps, which is ten times faster than the 200 Mbps speeds available on many 4G networks.
'The question is how do we make a system that can connect a whole continent at 10 to 20 Mbps?' Håkan Andersson, a tech researcher at Ericsson told Fortune.
The world's wireless will also have to decide what 5G needs to do that the current, fourth generation of wireless networks will never offer.
'It is unclear what the opportunity or weakness that 5G should address is,' researchers at GSMA, the global trade group of mobile network operators, said in a report issued in December that punctured some of the more visionary claims for 5G.
With discussions on setting 5G technical standards yet to begin, a final standard is expected in 2019, experts say.
That will not stop network equipment, such as Ericsson, from touting projects as ready for 5G.
NOKIA'S 5G TECHNOLOGY IS 40 TIMES FASTER THAN 4G
Networks across the globe are still working on the roll out of 4G, but that hasn't stopped them trying to make our mobile internet even faster for the next-generation of devices.
At a summit in Boston in April, Nokia Networks demonstrated a system that can deliver speeds of up to 10 Gigabits per second (Gbps).
This is 40 times faster than the current maximum speeds achievable on 4G and means full-length HD films could be downloaded in the blink of an eye.
Such speeds could also pave the way for next-generation video and pictures on 8K - twice as clear as 4K and 16 times as clear as HD - as well as reduce the lag on video calls.
Nokia Networks teamed up with National Instruments (NI) to build what it's calling the fastest cellular technology ever tested. It sends data over a frequency of 73,000 MHz, or 73GHz.
Wavelengths in this band can be as small as millimetre, and are also known as millimetre wave or mmW and are currently used by radio astronomy, radars on aircraft and security scanners in airports, for example.
By comparison, current mobile networks range between 700 MHz and 3,500 MHz, while the maximum theoretical speeds for 4G is 42Mbps.
The Nokia Networks system is 10 times faster than the current fastest fibre internet technology, including Google Fiber in the US.
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