Every major Android smartphone, manufacturer, from HTC to ZTE, has released or officially announced their 2013 flagships, which comprise of 5-inch smartphones with 1080p displays (except the HTC One with a 4.7-inch 1080p display). The Samsung Galaxy S 4 appears to be the early favorite, and it does not look like the competition is offering anything that would derail Samsung ambitions of a having the best selling Android smartphone in 2013.
The fly in the ointment for Samsung could be LG. LG has already released a very interesting Phablet the LG Optimus G Pro which impressively places a 5.5-inch Full HD display in a package more compact that the 5.5-inch Samsung Galaxy Note II. Expected to hit the market in the second quarter of 2013, the more modern LG Optimus G Pro is expected to steal some sales from the Samsung Galaxy Note II. The LG Optimus Pro and might take some of the thunder out of the Samsung Galaxy S 4 as well.
Sometime early in the third quarter of this year, LG should be releasing an update to its 4.7-inch LG Optimus G (the basis for the Google Nexus 4), with the more powerful Qualcomm S800 processor and 3 GB of RAM. This phone is also rumored to come with a 5.2-inch display with on-screen buttons.