Can you use an Orange sim card in a T-Mobile phone now that they share signals?
No you cannot use the Orange Sim card in T-Mobile Phone.You need to Unlock the Mobile Phone from network lock to use other GSM Network Sim card....Then Only you can use Orange network sim card....They won't carry same signals.You can Unlock T-Mobile Phone easily using the Unlock code from here Theunlockspot.com/supported-networks/rs10wp11/