Last year's LG G3 was a massive improvement on the fairly disappointing G2, but it still wasn't enough to tackle the likes of HTC and Samsung. Given the mostly-positive responses to the Galaxy S6 and One M9, the upcoming G4 has a lot to live up to if it wants to succeed. But before that can happen LG actually needs to announce the thing.
MWC may have been the big event for Samsung and HTC to launch their latest flagship devices, but LG chose to disregard Barcelona in favour of its own launch event. Set to take place on the 28th of April, it'll be our first official glimpse at what LG is going to be flogging us for the next 12 months or so. Here's everything we think we know so far.
What's it going to look like?
Our earliest glimpse at the G4 came in the form of renders discovered by French gadget blog Nowhereelse.fr in the middle of March. They showed off a black phone with what seems to be a Flex-inspired curved screen. As with of a lot of other modern smartphones, these renders also suggested that the G4 would come in a gun-metal chassis.
More leaks appeared towards the end of the March, with photos of what appeared to be the final phone. The display here isn't curved, but the metal chassis is still there. It also revealed that the phone may come with a stylus, which, according to our own Gary Cutlack, means G4 adopters will be able to accurately draw genitals on their friends' faces.
By far the biggest leak came just over a week ago, when notable Twitter leaker Evan Blass discovered an unannounced marketing website chock full of details about the phone. Gone is the metal chassis, replaced with a Samsung-esque leather backplate. The renders found added a small amount of confusion about whether or not the G4 will have a curved display, but it turned out that the angle of the renders made it look curved when it wasn't.
Note the slight curve around the edges
But a side view confirms that the phone will have a flat display.
Obviously the details on the site were not officially confirmed by LG, so they might not be 100 per cent accurate. But this close to launch it's the most clear unofficial source we have.
What will the screen be like?
Nowhereelse.fr's Twitter account, the source of the original leaked renders, claimed that the G4 would have dimensions of 148.9 x 76.5 x 9.9mm. This suggests that the phone would have a screen between 5.5- and 5.7-inches in size. Later on, the leaked marketing site seemed to confirm that the screen would be 5.5-inches, and would have a quad HD display -- just like the G3.
LG later teased the phone's display, apparently confirming that it would definitely be QHD. It's also supposed to be 25 per cent brighter and have a 20 per cent wider colour range than the G3.
The final point of note is that the G4 will apparently kill off the bezel, leaving just 0.7mm of unused space around the screen.
What about the internal specs?
The leaked marketing site spills a few secrets once again, claiming that the phone would have a replaceable 3,000 mAh battery and a microSD card slot. Everyone can collectively sigh in relief knowing that LG probably will not go down the same route as Samsung just yet.
Early rumours claimed that the phone would come packing Qualcomm's flagship processor, the Snapdragon 810, and 3GB of RAM. Leaked benchmark tests later corroborated the amount of RAM, but suggested that LG would ditch the 810 in favour of the slightly weaker Snapdragon 808.
Unless there's been an enormous shake-up over at LG HQ, the phone is going to arrive running Android Lollipop. A teaser video seemed to confirm this, also showing off LG's skinned version of the OS.
How's the camera looking?
The video teaser above claimed that the G4 will come with an aperture of f/1.8, which would make it pretty useful for low-light situations. That also apparently makes it the widest aperture camera on a smartphone. Resolution wise we're looking at a possible 16MP which, while lower than a lot of current flagships, is a nice boost from the G3's 13MP.
The leaked renders also seemed to reveal that the G4 will come with a laser guided focussing system similar to the one included with the G3. Whether it will be the same model, or if it will be an improved version, is unclear.
There hasn't been any word on when the phone will be released or how much it will cost. Presumably it will follow the pattern of previous LG flagships, and will end up being slightly cheaper than other flagship phones on the market. For comparison's sake, the LG G3 landed at £479 on pre-orders with Amazon when it first launched. Make sure to check back on April 28th -- we'll be at LG's press event later this month, and will bring you all the official details as they're announced.