How to Migrate to AIRTEL ONE SIM Tariff plan To migrate to Airtel One SIM,\u00a0Kindly dial\u00a0*337#or send\u00a0\u2018ON\u2019\u00a0to\u00a0337. First migration is absolutely FREE but if you want to migrate again with the same line, they will charge you N100 fee. Again, to add these 2 special numbers are FREE but they will\u00a0charge N20\u00a0if you want to register another lines other than the first two lines. Please note that the phone numbers should be fully registered at the nearest Airtel shop. How to Add the Special Numbers in Airtel One SIM Tariff Plan\u00a0 To add the two special numbers To add special number, dial; *337*2*phone-number# How to Remove Special Number in Airtel One SIM Tariff Plan To remove a special number, dial; *337*3*phone-number# How to Check Already Added Number on Airtel One SIM Tariff Plan To check already added, dial; *337*4# If you want to access all the other options if you dial\u00a0*337*1# Please note that the\u00a0FREE 15MB\u00a0is only\u00a0Valid for 3 days. You can migrate out from this tariff plan anytime if you so wish to.