
GSM · New division
Missed Call & Collect Call, for telecom operators.
Zero-cost, no-data engagement rails that reach every subscriber. Verification, opt-in, reminders and reverse-charge connectivity that work on any 2G handset, with no app and no data plan.
In prepaid markets, the cheapest channel wins.
Across Africa, the vast majority of subscribers are prepaid and data-light. A megabyte costs more than a meal in some markets, so SMS gets ignored and apps never get installed. But a missed call costs nothing, and everyone already knows how to “flash” a number to be called back.
PhotonMatters turns that universal behaviour into a programmable engagement layer. A subscriber dials and hangs up, or accepts a reverse charge, and your platform fires the right action: verify, opt in, remind, or connect. No data, no app, no friction, the entire prepaid base becomes reachable.
- Reaches the data-light prepaid majority
- Free for the subscriber to use
- No smartphone or install required
- New high-margin revenue line for operators

Missed Call Service
Zero-cost subscriber engagement. A subscriber rings a dedicated number and hangs up, the call never connects, nothing is charged, and your gateway fires the action you’ve configured.
Collect Call Service
Reverse-charge connectivity. The subscriber places a call they can’t pay for; the receiving party accepts the charge. Conversations happen even when the caller has zero credit.
From a single dial to a fired action.
- 01
Subscriber dials
A subscriber flashes a dedicated number or starts a reverse-charge call. Free, on any 2G handset.
- 02
Carrier triggers event
The operator network signals the call to our gateway, which captures the number and campaign.
- 03
Action fires
OTP, opt-in, reminder, call-back or reverse-charge connect. Routed by the rule you configured.
- 04
Logged & reconciled
Every event is recorded for analytics, billing and campaign attribution in real time.
Why operators care
Zero cost
to the subscriber to engage
Any 2G phone
works on the simplest feature phone
No app, no data
nothing to install or connect
Massive reach
every subscriber on the network
Connect the channels
Pair GSM rails with your lending campaigns.
Combine missed-call opt-in and collect-call outreach with PhotonMatters campaign and collections intelligence to drive response and recovery, without spending a cent of subscriber data.