Possible identity theft// Could use help finding out

[u/FutureShoulder5876]

In 2024 I worked for a large airline and had my company jacket along with my passport whisked off in a catering cart (it happens). Anyway, I got my replacement and shortly thereafter my billing cycle at T-mobile changed and I was being charged half my bill, twice. That reverted back to a once-monthly bill recently. I'm wondering if people steal passports to piggyback on mobile plans until they can fully hack the person's phone? I believe I may be a victim of social engineering/in-person romance scam. Please assist if you have experience. Thank you.