Spreadtrum SL8541E

The (now primarily under the UNISOC brand) is the quiet powerhouse behind a new wave of affordable 4G Android smartwatches and entry-level IoT devices. While it isn’t a flagship smartphone chip, its specialized architecture makes it a go-to for manufacturers like PMC TechLife looking to cram full cellular connectivity into wearable tech.

(If you require an exact datasheet table — CPU cores, clock, supported memory speeds, modem bands, package, and power figures — I can retrieve the vendor datasheet.)

Benchmark Scores (for reference)