In Jain tradition, “Jina Phulinga Mantra” is generally understood as the “Visahara Phulinga Mantra” mentioned in the Uvasaggaharam Stotra, which is associated with Lord Parshvanath. It is recited with devotion for protection from difficulties, fear, illness, poison-like afflictions, and other obstacles. ( jainknowledge.com)

Its spiritual significance is mainly:

• Devotional remembrance of Lord Parshvanath.
• Faith in protection from upasarga, roga, mari, and duhkha.
• Inner purification and calmness through sincere recitation. ( jainknowledge.com)

In Jain understanding, the power lies not in mere sound alone, but in right faith, devotion, and pure intention while reciting it. ( jainknowledge.com)

If you want, I can also give you the exact verse and its meaning in simple language.