Replacing a Lipo phone battery with a li-ion battery
Charging voltage for the newer Li-Po cells is usually 4.35 V. When you use an older Li-Ion cells in modern phone, the battery standard charge level of 4.20V will be exceeded substanially. It might be OK to charge a 4.2V battery with 4.35 V levels, but battery cycle life will be decreased about 3-4-fold, as this example shows.  

But before worry about all this, check the actual charging voltage on your phone, maybe it is just 4.2 V standard.