What is the best phone company that sells long lasting battery life phones?

Awell-diversified portfolio needs about 20-25 stocks from different categories is this true or false?

In which phase does software coding and testing happen in the spiral model? the spiral model does not have a separate testing phase. both, software coding and testing occurs during the phase.

Technician a says that a shop towel should never be used to clean around the flange area before replacing an automatic transmission filter. technician b says that a dimpled transmission fluid pan can be repaired. who is right