Your use of terminology suggests you have already looked at the FinCEN Guidance,
and realized it does not specifically address your issue. Regardless, they clearly want this activity reported without regard to the threshold amounts.
If you use $1500, the SAR is voluntary. If you use $120,000, the SAR is mandatory. (Either way, you have complied with the substance of the guidance.) If the phone was broken, I would use the latter figure. Otherwise, I would call FinCEN to avoid the sharpshooting reviewer who can't find anything else and who prefers form over substance anyway.