The only thing that will improve network speeds are as follows:
1. Better antenna on device.
2. New device with better antenna.
3. Being in an area where signal is better (i.e. less buildings, more towers or closer to towers).
4. Switching to a different carrier.
These are a few things that can help. Unfortunately, they all require money to be spent somehow.
Apps that claim to make your radio signal better are a sham.
It's not wrong to fondle the s pen.