Indicate whether the following is a sentence or a fragment. Texting on her phone.
sentence
fragment

Fragment

Explanation:

"Texting on her phone." isn't a complete sentence on it's own.

If you added "she is, or (her name) is..." then it would be a sentence.

For example:

Mariah is texting on her phone. (Is a complete sentence.)

cassius, casca, and their allies plant false documents to manipulate brutus to join their cause to remove caesar. after doing so, they visit brutus at night in his home to persuade him of their views. there they plan caesar's death. brutus is troubled but refuses to confide in his devoted wife, portia. on 15 march, caesar's wife, calpurnia, urges him not to go to the senate. she has had visionary dreams and fears the portents of the overnight storms.

lets none because you provide no details.