Hi there! Sorry for the delayed response. Support is available from 6:00 a.m. to 10:00 p.m. CST. The SIM card type SIMOLW416TQ works with the Samsung Galaxy S10. We remain at your service. If you have any other question, just let us know.
We understand. You can activate the device online at https://myaccount.boostmobile.com/activations.html. Just to confirm: Was this device originally from another carrier? If the answer is yes, what other carrier?
WUnderstood. We just verified and confirmed information that the Samsung Galaxy S10 models from other providers are not compatible with Boost Mobile. Only the unlocked version that is offered be Samsung can be activated on our network. That is why your At&t version of this phone is not activating.
AT&T does not work on Boost/Sprint they have different frequencies that they operate at to save money they have phones made for specific carriers. AT&T is GSM while Boost/Sprint is CDMA. Uness it was an internationally branded phone or bought unlocked from Samsung it doesn't have both.