A tech reviewer who switched to eSIM with Google's Pixel 10 series expresses deep regret over the transition from physical SIM cards. The shift, aimed at saving space in smartphones, has introduced frustrating complications in managing phone numbers. While eSIM offers benefits like multiple profiles, real-world issues with transfers highlight ongoing challenges.
SIM cards, a staple of mobile phones since the 1990s, have evolved from bulky credit-card-sized inserts to tiny nanoSIMs. However, device manufacturers are phasing them out to reclaim precious internal space. The eSIM standard, introduced in 2016, embeds subscriber information directly onto the phone's circuit board, allowing software-based swaps and support for multiple profiles without removable cards.
Apple pioneered mandatory eSIM adoption with the iPhone 14 in 2022, using the saved space for a slightly larger battery in eSIM-only models. The international iPhone 17, which retains a physical slot, has an 8 percent smaller battery by comparison. Google followed suit this year with the Pixel 10 series, making US versions eSIM-exclusive, though without additional perks like expanded batteries over international counterparts.
Android's recent system-level eSIM support facilitates downloads and transfers, but problems persist. The reviewer, who avoided eSIM until testing the Pixel 10, encountered issues twice in three months while moving their number. The first glitch was resolved via the T-Mobile app after authentication. The second, however, stranded them without a working SIM, as carriers verify identity via SMS—a method impossible without phone access. This forced a trip to a physical store, turning a simple swap into an hour-long ordeal.
Phone numbers serve critical roles beyond calls, acting as keys to banking, apps, and exchanges through SMS-based multifactor authentication, which remains insecure. Unlike foolproof physical SIMs that swap in seconds, eSIMs risk corruption during transfers, amplifying lockout potential. The reviewer notes carriers' SMS reliance exacerbates eSIM woes, suggesting alternatives like app-based verification, as seen in Google Fi, secured by Google account features.
This transition echoes past sacrifices, like ditching headphone jacks and microSD slots. Trading reliability for an 8 percent battery gain raises questions about the value of going eSIM-only.
