Use the legitimate, official Truecaller: Caller ID & Block app from the Google Play Store.
Cracked apps often have hidden code that connects to phishing servers.
While the temptation to get premium services for free is high, the risks far outweigh the benefits. You are better off using the official free version or paying for premium to ensure your data stays secure. The potential for malware stealing your personal information is not worth saving the cost of a subscription.
You cannot restore purchases or receive updates. 3. Security & Safety Risks