Tango SA is Luxembourg's second-largest telecom operator and part of the Proximus Group. Its business phone product, Fix4Bizz, is designed for freelancers and small teams that already use Tango for mobile and internet. Here is what that actually means for a business choosing a phone system.
⏱ 6 min read · 🇱🇺 Local provider · 📅 Updated April 2026 · 🔗 tango.lu
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Tango SA is a Luxembourg telecom operator, ILR-regulated, and Luxembourg's second mobile network after POST. Tango is part of the Proximus Group, the Belgian incumbent operator.
For businesses, Tango positions itself as a single supplier for mobile, internet, and telephony, with an emphasis on small teams that want one provider for everything. Its business phone product is Fix4Bizz.
A bundled telephony stack tied to Tango's own network. Convenient for existing Tango customers, constrained for anyone outside that ecosystem.
A hosted phone system with auto-attendant, voicemail, call forwarding, call pickup groups, call cascade, and absence management. All features included in every plan, no tiered packages.
An iOS and Android app that extends the business number to employees' smartphones. Runs over Tango's mobile network (not WiFi), so a Tango mobile subscription is required for each user.
Hardware rental covered in the monthly fee. Yealink T42U, T46U, T48U, DECT, and conference models are available.
Fix4Bizz only works on a Tango internet connection. If the office uses a different ISP, Fix4Bizz is not available. This is the most important factor to understand before choosing.