Question: how to check data balance on h2o wireless?
Answer: How it Works. Order Sim and advise us your USA arrival. ... 
Check your Balance. Check balance - *777# and "Send" ... 
H2O Wireless Info. H2O Wireless Customer Service is available 9AM to 11PM at "611" from the handset or +1-800-643-4926 from landline.
Contact Us.