You can dream, but the laws of physics are unpleasantly difficult to ignore.
Starlink requires clear line-of-sight between the antenna and the satellite. The antenna is a relatively large phased array antenna (active aperture ~0.5 m) and narrow beam (~3°). Anything smaller or with wider beam, and the link budget is gone. The link budget is largely limited by laws of physics (distance, beam width, atmospheric absorption) and there is not much extra tolerance (it is not needed in this application, and any added tolerance would require a larger antenna).
No, mobile phones are not going to communicate with Starlink satellites. Yes, satellite phones do exist, but the data transfer rate is on kbit/s range. The most important metric in measuring the efficiency of any radio system is energy per bit transferred (J/bit). For example, an Iridium satellite phone uses approximately 0.25 mJ/bit (0.6 W for 2400 bit/s). For a 100 Mbit/s connection the transmission power would be 25 kW...