1991 CE
GSM and interoperable digital mobile telephony
Information & communication · Technology · Infrastructure
The first GSM call was made in Finland in 1991 after European technical standardization. GSM combined digital voice, SMS, and later data, facilitating interoperability and roaming; its worldwide adoption depended on spectrum licensing, operators, prices, and local networks.
Precision, calendar, and review
- Start
- year · no uncertainty qualifier in this record
- Calendar and convention
- Historical-era years; the source calendar is not identified. No conversion of days is assumed.
- Year zero
- The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
- Documentary review
- Date not recorded
Reading the date: point event.
Sources
- www.gsma.com (opens in a new tab)
Source provenance and scope
- Publication date
- Pending verification: the source could not be accessed
- Bibliographic date checked
- 2026-09-23
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