Answer:
The sentence has several errors. The subject and verb do not agree (the subject is "call" and the verb is "was missed"). Additionally, the preposition "from" is used incorrectly (it should be "about" instead), and there is an incorrect use of the possessive form of "results" (it should be "result" without the apostrophe).
Correcting these errors, the sentence becomes: Unable to locate his phone, the call from the doctor was missed about the test result.
Here, the subject ("call") and verb ("was missed") agree, and the preposition and possessive form are used correctly. This sentence is now grammatically correct.