Several carriers have been prompt with their software updates for the recently released Samsung Galaxy S4. The device has been on the market for less than two weeks, and T-Mobile and AT&T are already pushing out updates.

T-Mobile, which began offering the Samsung Galaxy S4 online last week and begins selling it in select stores on Wednesday, was the first carrier to push out an update on Tuesday. Samsung Galaxy S4 handsets can download the build number M919UVUAMDL update over the air as well as through Samsung’s Kies software.

The update brings a few enhancements to the Samsung Galaxy S4, including improvements for the Visual Voicemail app and the NFC-powered ISIS mobile wallet app.

Be advised that the update software weighs approximately 168MB. Your Samsung Galaxy S4 handset should be more than 50 percent charged when beginning the update. Your data connection will also need to be enabled in order to complete the update.

Check out T-Mobile’s support page for more information.

AT&T, which began offering its Samsung Galaxy S4 on April 27, pushed out its update later on Tuesday. Galaxy S4 handsets can download the build number I337UCUAMDL update over the air as well as through Samsung’s Kies software.

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AT&T's software update for the Samsung Galaxy S4 Droid Life

Users report that no major improvements have been seen on this update, which appears to be simply a performance enhancer. Perhaps the update will resolve the ghosting and lagging issues some users have reported while scrolling, but this has not been confirmed.

Be advised that the update software weighs approximately 21MB. Users can check for the download by going to Settings > More > About device > Software update. The update should take just a few minutes to download and install.

Gotta Be Mobile notes that those planning on unlocking the bootloader on their Samsung Galaxy S4 handsets should probably not install this update until developers give the go-ahead.

AT&T’s Samsung Galaxy S4 notably sells with its bootloader unlocked, and while many developers have already cracked the bootloader, they have not yet released any unlock tools for public use.

The T-Mobile Samsung Galaxy S4 sells with its bootloader unlocked, and CyanogenMod founder Steve Kondik has already released a CyanogenMod 10.1 nightly for that variant of the Samsung Galaxy S4.

The only other U.S. carrier that has already released the Samsung Galaxy S4 is Sprint. The network, which sells its Galaxy S4 with an unlocked bootloader, has not yet announced any updates.