JOINING BOOST & ACTIVATING YOUR SIM
SETUP & PHONE SUPPORT
RECHARGE & NETWORK SUPPORT
I just received my Samsung Galaxy S20 5G that I ordered from Boost Mobile (to replace my Galaxy S8 which has died).
The S20 came with a different SIM card in an envelope, so I removed the SIM card that was in the phone and replaced it with the one from the envelope.
I went online and went through the Activation process to transfer my existing number, which seemed to go okay.
I went through the regular set up process on the S20.
It has been over an hour now, and my S20 has notifications that say "Invalid SIM card" and "Please contact Sprint to unlock your device."
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You may want Boost USA, which is at https://community.boostmobile.com/
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