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Sony Mobile Communications (formerly Sony Ericsson Mobile Communications) is a wholly owned unit of Sony Corporation. Founded in October 2001 as a joint venture between Sony and the Swedish telecommunications equipment company Ericsson, under the name Sony Ericsson, Sony acquired Ericsson's share in the venture in February 2012.
- Verizon and Sprint chose the CDMA mobile standard, developed by US firm Qualcomm, which operated on different frequencies than GSM, adopted by Europe
- After the initial boom in the mobile industry following deregulation, the US telecommunications industry began to decline from 2001