Type · A/B testing
We are considering offering a 'data rollover' feature for our mobile plans. How would you design an A/B test to evaluate the impact of this feature on customer retention and ARPU?
How to Pass the Iliad / Free Product Manager Interview in 2026
The Iliad / Free DNA (TL;DR)
The hiring managers at Iliad / Free seek individuals who can pragmatically innovate, especially in disrupting telecom norms exemplified by Free Mobile. They look for direct, cost-effective solution generation, aligning with Xavier Niel's vision for lean, impactful operations.
The Iliad / Free Interview Loop
Your onsite loop will typically consist of 4 rounds.
- 1
Round 1
Recruiter ScreenMotivation, basic fit, logistics. - 2
Round 2
Product Sense / DesignCustomer empathy, creativity, structured design thinking. - 3
Round 3
Analytical / ExecutionMetrics definition, root-cause debugging, A/B testing. - 4
Round 4
Strategy / EstimationMarket sizing, competitive positioning, business trade-offs.
The Danger Zone: Top Reasons Candidates Fail
Based on our database of Iliad / Free interview outcomes, avoid these common traps:
- Giving a generic answer about wanting to build products without connecting it to Iliad/Free's mission or the telecom space.
- Describing a situation where they simply followed instructions rather than taking initiative.
- Designing a plan that's too generic and doesn't address the specific needs of gig workers (e.g., unpredictable data usage, need for reliable connectivity during work hours).
- Focusing only on vanity metrics like 'feature adoption rate' without linking it to business outcomes like plan upgrade/downgrade frequency or customer satisfaction.
Test Yourself: Real Iliad / Free Questions
Three real prompts pulled from our database.
Type · conflict resolution
Tell me about a time you had a significant disagreement with an engineer or designer about a product decision. How did you approach it, and what was the outcome?
Type · product design
Imagine we want to launch a new mobile plan targeting gig economy workers (e.g., delivery drivers, freelance consultants). Design this plan, including key features, pricing, and how we'd measure success.
+ many more questions, signals, and worked examples
Sign up to unlock the full Iliad / Free grading rubric
Iliad / Free Interview Question Bank
A sample from our database, grouped by round. Sign up to see the full set.
7 of 19 questions shown
1
Recruiter Screen
1- 1
Type · motivation
Why are you interested in product management at Iliad/Free, and what specifically about the telecom industry excites you?
2
Product Sense / Design
3- 2
Type · product design
Imagine we want to launch a new mobile plan targeting gig economy workers (e.g., delivery drivers, freelance consultants). Design this plan, including key features, pricing, and how we'd measure success. - 3
Type · product improvement
Freebox Delta is one of Iliad's flagship products. How would you improve the user experience for customers who primarily use it for streaming high-definition content and online gaming? - + 1 more questions in this round (sign up to unlock)
3
Analytical / Execution
3- 4
Type · metrics definition
We've just launched a new feature for the Free mobile app that allows users to easily switch between mobile plans. What are the key metrics you would track to determine its success, and why? - 5
Type · root cause analysis
Customer support is reporting a sudden spike in complaints about slow mobile data speeds in Paris. How would you investigate the root cause? - + 1 more questions in this round (sign up to unlock)
4
Strategy / Estimation
3- 6
Type · market sizing
Estimate the total addressable market (TAM) for 5G fixed wireless access (FWA) services in France for residential customers over the next 5 years. - 7
Type · competitive analysis
How should Iliad position its Free brand against competitors like Orange, SFR, and Bouygues Telecom in the ultra-competitive French mobile market? - + 1 more questions in this round (sign up to unlock)
Unlock all 19 Iliad / Free questions, free
No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.
Interview tracks at Iliad / Free
How Iliad / Free's DNA translates across functions. Pick your role.
Compare Iliad / Free with similar employers
Same DNA, different bar. Browse the closest companies in our database and see how their loops differ.
Deutsche Telekom
Same tierAt Deutsche Telekom, the interview loop evaluates a candidate's alignment with the 'Living Culture Day' principles, e...
See Deutsche Telekom interview questions
Telefónica
Same tierTelefónica's "Ready for Next" philosophy underscores the importance of adaptability and forward-thinking in their int...
See Telefónica interview questions
Proximus
Same tierThe Proximus Group Skip interview stage often evaluates a candidate's strategic vision for the Domestic Benelux Telec...
See Proximus interview questions
Practice Iliad / Free interviews end-to-end
Iliad / Free Mock Interview
Run a live mock interview with our AI interviewer using Iliad / Free-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.
Open
STAR Stories for Iliad / Free Behavioral Rounds
Build a Story Bank of your past wins, mapped to the leadership signals Iliad / Free interviewers grade on. Reuse them across every behavioral round.
Open
Iliad / Free Interview Prep Hub
The frameworks behind every Iliad / Free round: CIRCLES for product sense, hypothesis-driven debugging for analytical, STAR for behavioral. Learn each one in 10 minutes.
Open
Interview Frameworks
CIRCLES, STAR, AARRR, RICE, MECE. The exact frameworks that make Iliad / Free interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.
Open
Sample answers
What a strong answer to these Iliad / Free interview questions shows.
We are considering offering a 'data rollover' feature for our mobile plans. How would you design an A/B test to evaluate the impact of this feature on customer retention and ARPU?
A strong answer shows: Proficiency in designing controlled experiments (A/B tests).; Ability to formulate clear hypotheses and define relevant success metrics.; Understanding of potential biases and how to mitigate them..
Tell me about a time you had a significant disagreement with an engineer or designer about a product decision. How did you approach it, and what was the outcome?
A strong answer shows: Ability to handle conflict constructively and professionally.; Skill in influencing others and reaching consensus.; Focus on data and user needs to drive decisions..
FAQ
Explore careers on Workfive →