Powershell Script to copy mobilephone number to telephone number

Question

Hello Friends,
I need a powershell script to copy mobilephone attribute to telephone attribute.
Scenario is below:
I have Group "Test1" , I need to copy mobilephone attribute to telephone attribute of all the uses in this Group.
I have created the script but its not giving desired result
"Get-QADGroup "test1"|
ForEach-Object{
Get-QADGroupMember$_.samaccountname}|
selectsamaccountname,mobilephone
| export-csvD:\test1.csv
Import-Csv "D:\test1.csv"|
%{Get-QADUSer$_.Samaccountname
| Set-QADUser-ObjectAttributes@{telephonenumber=$_.mobilephone}}"
My observation:
1.while I exporting the attribute , i am not getting proper telephone format in CSV which is "+919999XXX1111" 
2. If Telephonenumber attribute of a user is allready filled , it does not update the attribute. it only update the attribute if it is blank
Plase help to resolve it.
this is kind of urgent , thank you all in advance

Answer 1

Thank you for your reply
but it is not changing anything however scripts executes perfectly.
I want to add one more thing here when i export the "mobilePhone" attribute it comes in the format "9.2E+11"
whereas it should come in the format "+919999XXX111".
So, as i said earlier if "telephonenumber" fields remains blank it takes the value "9.2E+11" which is error. but it is not replacing if fileld has some value and value format is not correct.