I have tried to send 1 iota from my android wallet. Despite doing the "replay bundle" several times already, the transaction is still not confirmed.
Another suspicious thing I should mention which may or may not be related to this problem is that the address I used to send had and still has 1 extra iota that I think it should not be there.
This address used to have 111 iotas but now it has 112 iotas
this extra iota came from an iota drop party https://bitcointalk.org/index.php?topic=1216479.msg20005328#msg20005328
I never expected to have gained the 1 iota because I was late to the party until I checked my wallet yesterday to find out I indeed had acquired it.
My hypothesis is that the extra 1 iota is a "double spent" iota and that is why the new transaction is having difficulty being confirmed.