There are 4 states coded 1,2,3 and 4. Within each state, I have generated a unique id to identify mobile numbers using the following code:

Code:
set seed 2803
gen random=runiform()
bysort state (random): gen id=_n
However, in the master data set (with over 600,000 mobile numbers) there are several that have duplicates. How can I ensure that all the mobile numbers that are repeated get assigned the same id? For instance, if "1234567890" is appears 3 times and currently has 3 different ids, I want to generate a new variable that assigns the same id to these 3 observations with the same phone number.

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input float state str11(mobile gender)
4 "6000000000" "Male"  
4 "6000000000" "Female"
4 "6000000000" "Male"  
4 "61111111111" "Male"  
4 "61111111114" "Female"
4 "6062728189" "Female"
3 "6839299911" "Female"
4 "1212112333" "Male"  
3 "2312312312" "Male"  
3 "3037655823" "Female"
3 "3048692376" "Male"  
4 "4056439806" "Female"
2 "4060072276" "Male"  
2 "5062303315" "Male"  
2 "5562589458" "Male"  
2 "5062653281" "Male"  
3 "5065858911" "Female"
3 "1066464736" "Male"  
1 "1066659166" "Female"
3 "1067447415" "Male"  
4 "1068252085" "Male"  
3 "1069373244" "Male"  
4 "1070890654" "Male"  
3 "1071245191" "Male"  
4 "1076167740" "Male"  
4 "1076543908" "Female"
4 "1079472160" "Female"
3 "1080984749" "Male"  
2 "1111808637" "Female"
4 "1183964153" "Female"
4 "1084763982" "Female"
4 "1084763982" "Female"
4 "1085351526" "Male"  
4 "1098216759" "Male"  
4 "1098345612" "Female"
4 "1098372939" "Male"  
3 "1102671939" "Female"
4 "1110099285" "Male"  
4 "1110099285" "Male"  
4 "1110099285" "Male"  
4 "11111111111"Male"  
3 "1117037204" "Female"
2 "1122530373" "Male"  
3 "1123334455" "Male"  
2 "1125303731" "Male"  
4 "1134543654" "Male"  
3 "1155288929" "Male"  
3 "1156498641" "Male"  
2 "1162462846" "Female"
2 "1162652122" "Female"
2 "1162652152" "Female"
2 "1162867644" "Male"  
4 "1172839450" "Male"  
3 "1173431643" "Female"
3 "1173710363" "Male"  
3 "1179879464" "Female"
3 "1180471007" "Male"  
4 "1181636878" "Male"  
3 "1194946161" "Male"  
4 "1199519990" "Female"
2 "1205525819" "Male"  
2 "1206586264" "Male"  
2 "1206586264" "Male"  
2 "1208090188" "Male"  
4 "1209870987" "Male"  
4 "1211222333" "Female"
4 "1222222222" "Male"  
4 "1225025679" "Female"
1 "1251640258" "Female"
end
Truly appreciate any help and guidance!