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A complete change of opinion or belief. The phrase comes from the Italian term voltafaccia, meaning "about-turn." Everyone was surprised when the candidate made a complete volte-face on her stance on taxes.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

a volte-ˈface

(from French, formal) a complete change of opinion or plan: This represents a volte-face in government policy.This is a French adaptation of an Italian phrase and refers to turning to face the opposite direction.
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
TNS' VoLTE Registry solution enables data sharing and relieves the headache associated with complex data management processes.
Ooredoo is the first operator in Myanmar to demonstrate the benefits of VoLTE technology to its customers in partnership with Nokia.
The Fast VoLTE Launch solution, a complete pre-integrated virtual IP Multimedia Subsystem (IMS), includes network functions such as virtual Multimedia Telephony Application Server (vMTAS), virtual Session Border Controller (vSBC), virtual Call Session Control Function(vCSCF), virtual Message Resource Function (vMRF) and virtual IPWorks.
He added that both VoLTE and VoWiFi will work with the existing SIM card and will be a seamless change-over.
The operators who launched VoLTE have had to perform extensive network configuration and interoperability testing to tune up their networks to be compatible with a limited selection of handset models to deliver a seamless end-to-end VoLTE service.
Furthermore, in areas out of 4G network, Idea VoLTE enables users to automatically be routed to 3G/2G network using Single Radio Voice Call Continuity (SRVCC), thus ensuring continuous call connectivity.
VoLTE technology enables subscribers to make voice calls over 4G network and use HD voice and video calling services.
This, the management of the telecoms service provider said, follows validation of the MediaTek 4G VoLTE (Voice over 4G LTE) solution on the Smile network.
Here are the phones that support Airtel VoLTE as of now.
VoLTE therefore allows "voice" to become just another app that rides on a LTE data network.
The telecom firm claimed it is the first telecom company in Bahrain to launch VoLTE service and all iPhone 6 or higher users would now be able to make wideband, high-quality phone calls using VoLTE.
According to Smart, devices will come with built-in VoLTE capability, meaning these will not require applications to make calls, such as Viber or social media platforms.
Etisalat has the launched the UAE's first Voice over LTE (VoLTE) service, offering better quality of calls through improved network performance.
Etisalat is set to launch the UAE's first Voice over LTE (VoLTE) service, that will enable Etisalat's mobile customers, both prepaid and post-paid, to use LTE for full voice and data services on a single LTE-enabled device.
In this study we envisaged test pole volte that is performance level, age, height and weight of athletes.