Instruct: Classify a review into positive or negative sentiment.
Query: Worst PDA I've ever bought

Very awkward to change the SIM or miniSD card or battery, and the control buttons are in non-intuitive places. Low-end cover and accessories, and the GPS isn't a real one, it requires an unlimited data subscription with the phone company ($40/month) plus a subscription with the GPS provider (also not accurate location). If GPS is turned on, the battery gets discharged in 20 minutes. Bottom line: this is a piece of junk!