what phone which beats?
if the amplifier on the phone is too weak or if the beats draw too much power the result is going to be max volume on one end but you can barely hear anything on the headphone end.
of course beats audio being the crap company they are doesnt want to list headphone specs however from what i've read they should be between 20-30ohm resistance which should be more than capable of being driven by ipods and most smartphones.
for the record i use some ath-m50s with a 35 ohm resistance (which means they require more power to drive than beats) and they work fine with an ipod classic or android smartphone.
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as far as a solution if its just a weak amp in your phone or if you have too much headphones for the phone...