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Comms Index

2021 Second Quarter Review

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Business mobility reflects UK bounceback, internal markets only, with even IDD significantly dropping for the first time since COVID & Brexit.

Our Quarterly Average comparison is aimed at providing insight into key trends, as we endeavour to share insight across the UK Enterprise and B2B markets.

Bob Baker

Bob Baker


Bob Baker is the owner and founder of Signum International Limited and acknowledged as an industry expert in the field of telecoms insights and billing

UK data growth is steady while there is a continuing collapse of international and roaming mobility.

Data Usage

28% increase in total UK data volume comparing Q2 2021 and 2020 Qavg shows both the return to mobile working and that behavioural usage changes are now ingrained.

Data Roaming

Reduction in total usage, reflecting travel restrictions, masks consistent increase on per user, per session averages.


Total talk times dropped, business got busier, returning to previous levels on a par with pre-Covid 19.

Voice IDD & Roaming

Everything indicates that Brexit and Covid-19, both home and abroad, is having a significant impact on UK trading.


The general downward trend that commenced H2 2020 continues reflecting a rise in IM app features (MS Teams, Google Workplace etc).


A Word About Our Data …

As we have integrated our Signum DNA into Telescope, our Self Service Analytics platform for communications insights, what better way to promote one of the UK’s largest enterprise based expense management research and analysis data warehouses.

We process in excess of 1M active subscriptions, 2.5 petabytes of data usage, 200M voice minutes and 25M SMS events per month:

  • All voice volumes are reported in minutes
  • All data volumes are reported in Gigabytes (Gb)
  • Each SMS/MMS as a single event record

Using a 5 month average (inclusive Nov’19 to Mar’20) as our baseline, we wondered how usage had changed and what our “new normal” looks like.

Data Indices


Avg Data Usage by Active Subscriber per Zone

Calculation = Total Gb Usage divided by Total Count of Active Subscribers per Zone


  • UK = United Kingdom
  • RLH = Roam Like Home (predominantly EU)
  • RoW = Rest of World (All non RLH / UK countries)


Monthly Aggregate Roaming Profile by Region

Calculation = Stacked 100% of Total Gb Usage by Region 


  • EU (RLH) = Roam Like Home EU
  • EU = Other Europe (non RLH)
  • NA = North Americas (USA & Canada)
  • APAC = Asia Pacific 
  • RoW = Rest of World

Notes about Data Zones

  • Roam Like Home (RLH EU) includes countries such as France, Germany, Greece, Netherlands and Spain
  • EU includes countries such as Albania, Bosnia, Israel, Turkey and Ukraine
  • North Americas includes both United States of America (USA) and Canada (CAN)
  • Asia Pacific includes countries such asAustralia, China, Japan, Malaysia and New Zealand as well as South Africa (ZAR) 
  • Rest of World includes all countries not incorporated in previous categories

Voice Indices


Average Total Talk Time in Minutes per Active Subscriber

Calculation = Total Monthly Minutes divided by Total Active (All) Subscribers


  • ITU ICT – Heavy User ( 140 Minutes) Benchmark profile

Average Call Duration by Call Type & Location

Calculation = Total Minutes divided by Total Number of Calls by Call Type


  • UK Std = UK Standard Geographic & Mobile
  • IDD = UK origination of International Direct Dial calls
  • EU O/B = EU origination of outbound calls
  • RoW B/W = Inbound and Outbound (Both Way) calls while


Monthly Aggregate Minutes Roaming Profile by Region

Calculation = Stacked 100% of Total Minutes Usage by Region


  • APAC = Asia Pacific
  • NA = North America (USA & Canada)
  • RoW = Rest of World
  • EU Other = European (Non RoamLikeHome)
  • EU (RLH) = European RoamLikeHome

Monthly Aggregate IDD Minutes Profile by Region

Calculation = Stacked 100% of Total IDD Destination Minutes Usage by Region


  • APAC = Asia Pacific
  • ME = Middle East
  • NA = North America
  • RoW = Rest of World
  • EU Other = European Non Roam Like Home
  • EU (RLH) = European Roam Like Home

Notes about UK Voice Minutes

Voice Minutes United Kingdom

  • UK landline and national are all calls starting with 01x, 02x or 03x
  • UK Mobile are all calls starting 07x and including corporate VPN services
  • UK NGN & Premium include all calls charged at higher out of bundle rates to non-geographic or premium destinations starting with 05x, 08x, 070x or 09x.

Notes about International and Roaming Voice

  • IDD is International Dialled Destination referring to all calls originating from the mobile device in the UK to any international destination
  • RLH O/B – Roam Like Home Outbound incorporates all calls originating from the mobile device while in RLH tariff countries to any international destination
  • RoW I/B – Rest of World Inbound incorporates all calls received by the user when roaming in non UK or RLH countries
  • RoW O/B – Rest of World Outbound incorporates all calls originating from the mobile device while roaming in non UK or RLH countries to any international destination

SMS Indices


Total Monthly SMS Volumes

Calculation = Total Monthly SMS Volumes


Monthly Aggregate Higher Rate SMS Profile by Type

Calculation = Stacked 100% of Total Higher Rate SMS Count by Type

Source = SMS 2 Non Standard Profile

Data = SMS 2 Non Std Profile


  • RoW = Rest of World inbound & outbound SMS/MMS when roaming
  • EU = European inbound & outbound non standard or RLH destinations, when roaming
  • IDD = Outbound SMS to International Destinations originating when in UK
  • UK Other = Inbound/Outbound SMS charged at non standard / out of bundle rates

Notes about SMS Profile

  • Premium includes all UK non-standard or higher rated SMS or MMS event charges
  • International Dialled Destination includes all SMS/MMS event charges to any international destination number originating when the device is in the UK home networks
  • Roam Like Home are all SMS/MMS event charges when the device is in a designated Roam Like Home country
  • Rest of World are all SMS/MMS event charges designated as roaming when not in in the UK home network or associated RLH country.
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Telescope is our telecoms focused, cloud-native platform for your sales and account management teams. From usage insights to tariff analysis, Telescope provides the right information to the right people in a digestible format with accurate context.

From winning a new customer to growing and renewing existing contracts, Telescope helps MNOs, MSPs and specialists better manage their data analytics for the entire customer life cycle.



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