The global rollout of Samsung's Galaxy S4 is now in full swing, capping months of anticipation for the new flagship coming from South Korea.

The reviews are favourable so far, with experts seemingly convinced that Samsung has managed to build another revenue-generating device capable of matching the money-making muscles of Apple's iPhone 5S.

But is it really a good buy? Many experts concluded that the GS4 is definitely a good smartphone with galore of offerings to boot but folks at Gotta Be Mobile would want Android fans to think hard first before getting their hands on the freshly-built Samsung device.

To avoid disappointments, GBM advises would-be GS4 buyers to first check the claims below:

The GS4 display is majestic but ...

A 1080p handset with Full HD Super AMOLED - what users can ask for? In fact display experts have concluded that the GS4 achieved what the Galaxy S3 had failed to do, equal iPhone 5's Retina display technology.

However, reports from XDA Developers have suggested that the top-notch GS4 screen display suffers from episodes of "smudging and purpling when scrolling through user interface."

While the incidents are far from widespread, the reports are troubling especially for a flagship phone that is in the initial stage of its commercial debut. It is unclear if the cases are isolated or due to shipment mishandling. There are indications though that a firmware update will correct the anomaly, which experts said, is usually the case.

The GS4 battery is a quick drain

Out of the box, the GS4 is provided with a battery flexing a 2600mAh rating, which is a massive improvement from what was seen with the GS3. But to GBM's dismay, a fully-charged batt seems to lose significant power juice overnight with the phone in a stand-by mode. Also, media playing appears to siphon out too much energy from the GS4 power-source, leaving it with less power to last the day.

GBM speculated that the issue is possibly induced by the Jelly Bean 4.2.2 that the GS4 was released with. The tech site noted that the same problem is not found on the Galaxy Note 2 and the Galaxy S3 - two handsets that currently run on Jelly Bean 4.1.

It could be that once an update is dispatched, the problem will disappear. For now, users can deal with it by getting a backup battery and thanks to the GS4's removable back cover sliding in a second batt into the unit is a but a breeze.