This approach has precedents in the mobile phone market where GSM phones may be locked for a period to one network operator.
(This approach; has; precedents in the mobile phone market) (GSM phones; may be locked; T:for a period to one network operator; L:the mobile phone market)
This approach GSM phones
has may be locked
precedents in the mobile phone market
T:for a period to one network operator L:the mobile phone market