Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
Tweet: @Apple thanks for ios10 update, even the best app @telegram freezing and crashing on SE.
This tweet contains emotions: 
anger, disgust, joy, optimism