Changing a phone's SIM card is always a difficult and sometimes aggravating process. For many smartphone models, changing the SIM involves removing the back cover or the battery, or having to restart the phone, or having to change your network configuration in the settings.

For phones that do not have more than a capacity of one SIM card, having registrations to multiple networks can be a pain - especially for those who use their mobile for work purposes.

With the release of the latest model of the iPad, Apple Inc.introduced the Apple SIM - a SIM card that let you swap mobile carriers without having to change between cards. However, it was only available to a few carriers in few terrirories as its function was limited to just two devices. Regardless of it being an innovative idea, the Apple SIM was bogged down due to most of its initial carriers eventually backing out. However, it seems like the major competitors in the smartphone market want to bring the concept back.

Sam Mobile claims that Samsung could begin rolling out the embedded SIM (or e-SIM) for the next iterations of its flagship phones. The Samsung Galaxy S7, the Samsung Galaxy S7 Edge, and the Samsung Galaxy Note 6 could all come with an e-SIMs as built in functionality, eliminating the need for multiple SIM cards from multiple carriers altogether.

Financial Times reported that Apple is also considering the e-SIM functionality.

Essentially, the e-SIM would allow users to register for certain carriers without having to obtain a physical SIM card from the network. This eliminates a lot of costs on the ends of both the users and the mobile networks, as well as making the process much easier. It also gives consumers much more freedom to choose and swap between carriers - however, it is likely that most carriers will still put certain limitations in place when using the e-SIM.

Whereas the previous Apple SIM failed to garner support from carriers, the e-SIM seems like it will fare much better. AT&T, T-Mobile US parent company Deutsche Telekom, Vodafone, Orange, Etisalat, Hutchison Whampoa, and Telefónica are, according to 9to5Google, in talks to be included with the e-SIM functionality that future phones will carry.

In terms of specs, the Galaxy S7, according to a previous article, rumored to use the upcoming Snapdragon 820 from Qualcomm instead of its own Exynos processor, which was used for the Galaxy S6. Given that the Snapdragon 820 is likely to be released for devices on the market on 2016, then the Galaxy S7 will likely not be released within this year.