Final Answer:
Loud should treat the contract modification as a separate contract. The customer's downgrade to less data constitutes a change in the original service agreement, adding a new service (2 GB plan) and removing another (5 GB plan).
New monthly revenue recognition journal entry:
Date | Account Title | Debit | Credit
-------|--------------|--------|--------
July 1 | Cash | 51.00 |
| Contract Receivable - 2 GB plan | | 51.00
Step-by-step explanation:
Separate contract rationale: The modification alters the original contract's core service offering (data plan), justifying separate accounting treatment. Although it doesn't involve additional goods (smartphone), it significantly changes the customer's service package.
Revenue recognition: Loud recognizes revenue for the new 2 GB plan upon receiving the July payment (51.00). The remaining 18 months of service will be recognized based on the new contract's terms, not the original one.