Saving Space in your Reference Design with eSIM. eSIM (eUICC) and what it means for chipset makers and device OEMs. Today consumers want bigger screens, more battery life, more storage, more rich media content etc. The (R) evolution that eSIM will create is unique, disruptive and can be compared to the time when black and white TV went to Color. The OEMs are adopting slowly, but like the days of B&W TV, the networks weren’t ready, and neither are the Mobile operators in the case of eSIM!