I’ll be in the EU for thirty days and 10 per day can add up plus I have to pay me regular bill. Any suggestions would be welcome!!
The $10 per day is up to a maximum of $100 per billing cycle. If you billing cycle starts/ends around the middle of your trip, that would be $200 of roaming charges + Plus your regular billing. Do you plan to use your regular amount of talk, text and data on your travels?
Cheapest way would be to get a plan/sim from a local carrier for the $30 days. Make sure your phone is unlocked and compatible or it wont work.
You definitely want a local prepaid sim. For example you can get a French sim from Free Mobile which gives 100gb of data for 20 euros a month. Just look at http://prepaid-data-sim-card.wikia.co... and select the country. If you'll be in multiple countries, you still get to roam within the EU and you get a quarter of the data allotment for roaming.