on 14-09-2016 21:33
Is one sim pay and go and the other pay monthly? If so the apn's are different so this could be the issue with the handset, ie the s7 has the settings that match his wives but his sim is different......
Not sure how that would prevent calls and texts from working?
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)